TheTunersGroup

Hi Duncan, If your car is road registered you'll need to check with an engineer about what can be done while keeping it road registerable. The Supercharged 911 is a very interesting example of how to take weight out of a car for track use ... It weighs 1124 kg. It runs a fibreglass bonnet and engine lid, fibreglass bumpers, carbon fibre doors, lightweight door trims, light seats, and even perspex moulded headlight covers instead of glass. The carpet is a lightweight carpet. So all those things are bolt ons that can be reverted back to stock if necessary. More info on it here ... http://www.tunersgroup.com/supercharged_911.html Continuing on that theme of focussing on power to weight ratio, I was very interested in this post on The Real JDM blog about the Lotus Exige 300R titled "The Car That Beat HKS’s Carbon Time Attack Evo - A Lotus" ... http://www.bespokeventures.com/blog/?p=1027 You're right that the seats can save a lot of weight. Many cars have very heavy factory seats. As an example of how much weight lightweight seats can save, the OMP WRC seats above in fibreglass weigh 8.8kg each. OMP also make a carbon version of them that is lighter still. How light you want to go seatwise depends on your budget of course. These Recaro's are about the lightest seats I've ever seen. They are a very special lightweight carbon kevlar version of the Recaro Profi SPA seat that were built for use in the V8 Supercars and rallying. These two are new old stock that have been sitting in a warehouse. They weigh approx 2.6 kg each. You've got to love the way Recaro weigh their seats to the gram To put that into perspective, the standard Recaro Profi SPA seat weighs 8.8 lbs (3.99 kg). Your best friend when taking weight out of a car is a set of digital bathroom scales - the guy who owns the supercharged 911 is constantly weighing parts on bathroom scales and then finding lighter alternatives - plus it's great to know how much weight you've taken out of the car Go much beyond bolt ons and you can end up with a car with no alternator etc, which isn't much fun and can be pretty impractical. Some batteries can be pretty heavy, so it might be worth checking out lightweight batteries like the Optima racing batteries - a lot of the 911 guys in the US run them. There are also mounting kits available for them ... http://www.allzim.com/acatalog/Steel_Optim...unting_Box.html There is a thread here about Optima battery weight savings ... http://forums.rennlist.com/rennforums/996-...ma-battery.html If you get to the point where you're weighing your wiring harness and trying to figure out which wiring circuits you can do without, you've probably gone too far for a car you ever want to use as a roadcar again How much do you like your air conditioning ? - The Tuners Group

More info here ... http://www.bespokeventures.com/blog/2009/1...r-the-r35-gt-r/ http://www.nagtroc.org/forums/index.php?showtopic=34871 - The Tuners Group

Hi Duncan, As far as I know no cars in Australia are running them yet, but as detailed earlier in this thread they are being used on a bunch of cars in the US. There are also a number of cars running them in Asia already ... We will be speaking to CAMS later this week to help familiarise CAMS and their scrutineers with the Aeromotions wings. - Adam

We have done further research today on the use of active aero on various supercars, and have added more info to our "The History Of Active Aero" article here ... http://www.tunersgroup.com/active_aero_history.html That new section on that page reads ... -------- There are a number of supercars that run active aero, some of them at the higher end of the price range and not frequently seen, so many people don't know that they run active aero ... Bugatti Veyron The Bugatti Veyron's active rear wing changes height and angle of attack. Adding height to the wing moves it into cleaner air (making it more effective), and adding angle increases the downforce coefficient of the airfoil (blade). Click here to view a video of the Veyron's rear wing in operation ... McLaren F1 Roadcar The McLaren F1 roadcar also changes the angle of attack of it's rear wing. http://en.wikipedia.org/wiki/McLaren_F1 reads ... Porsche Panamera The Porsche Panamera also uses active aero. http://www.autoblog.com/2009/06/25/first-d...78-years-in-th/ reads ... Ferrari 458 Italia The Ferrari 458 Italia also uses active aero. http://news.teamxbox.com/xbox/21027/Forza-...-Screens-Video/ reads ... Honda Honda is also working on active aero. http://www.autocar.co.uk/News/NewsArticle/...oncepts/244309/ reads ... -------- The rest of our "The History Of Active Aero" article is here ... http://www.tunersgroup.com/active_aero_history.html - The Tuners Group

Hi dazmo, We have added a number of quotes from drivers who have used the Aeromotions wings to our main Aeromotions page today. Some of the comments include: CANNONBALL R35 GT-R (WINNER OF ONE LAP OF AMERICA) BUDEZ R35 http://www.nagtroc.org/forums/index.php?sh...mp;#entry471848 reads ... FORGED PERFORMANCE R35 http://www.nagtroc.org/forums/index.php?sh...st&p=472311 reads ... http://www.nagtroc.org/forums/index.php?showtopic=34269 reads ... You can find more comments from very satisfied users here ... http://www.tunersgroup.com/Products/aeromotions.html - The Tuners Group

What kind of wheels are you looking at ? - Adam

G'day Mark, I can check with Aeromotions for you on what bootlids they recommend for use with the Aeromotions wing. Give me a call tomorrow. - Adam

Hi Duncan, Australian pricing is being finalised this week. As it says in the product announcement here ... http://www.skylinesaustralia.com/forums/Ae...ng-t294346.html ... "Pricing is being finalised and will announced on our website in the next few days. As always, our Australian pricing will be as close as possible to prices in the US where Aeromotions is based." PM's are turned off on the forum as it is impossible for us to keep track of which enquiries have been replied to via PM, so if you'd like to drop us an email to the email address listed on our contact us page here, I can send through the Aussie pricing to you as soon as it is finalised ... http://www.tunersgroup.com/Contact_Us/ - The Tuners Group

Hear hear. It's only right that companies who want to market products on SAU should become registered paying traders. We have been a registered paying trader on the site for a long time, and we are more than happy to help the owners of SAU with the costs of running this forum via the money we pay to be a registered paying trader. The owners and admins on SAU do a great job, and the bandwidth bill for the forum must be a monster, so all companies marketing products on SAU should become registered paying traders to help cover that cost. - The Tuners Group

Hi Dazmo, I'm more than happy to help in any way I can with data, info etc. The short answer to your question of "if this split wing was so great how come it has not popped up on many other cars ? (possibly it as been banned throughout many catagories)" is exactly because active aero has been banned in many racing categories. As I wrote above ... http://www.drive.com.au/Editorial/ArticleD...ArticleID=64211 reads ... When you have a ban on active aero (particularly in categories like Formula One), teams do not spend money on developing such technology. One of the driving forces in the more recent developments in active aero has been time attack categories, many of which do not ban active aero. Allowing active aero in those categories has led to development, and now that Formula One is looking to lift the ban on active aero. money will be spent again in research by F1 teams on active aero. Additionally, http://www.f1technical.net/articles/4577 reads ... So as shown above, the concept of splitting the rear aero into two independent surfaces is something that is well know to F1 also. Aeromotions wings are also being used in US time attack events including the AMS/NOS Energy Drink EVO X. http://aeromotions.com/2009/07/ams-evo-claims-track-record/ reads ... Aeromotions wings are also being used on a number of R35's in the US, including the Budez R35, and the Cannonball GT-R which won the One Lap Of America ... http://aeromotions.com/2009/05/cannonball-...lap-of-america/ reads ... You can view a photo gallery of various cars running Aeromotions wing here ... http://aeromotions.com/gallery/photos/ With the greatest respect, apart from the various examples above of active rear wings and split rear wings in various forms of motorsport as far back as the 1960's, and the fact that Nissan won the Japanese Grand Prix with an active split rear wing, the aerodynamics facility at MIT is one of the most respected aero research and development facilities in the world. As detailed above ... -------- "The Aeromotions Dynamic Wing™ was born in the wind tunnel at Massachusetts Institute of Technology (MIT), the world's premier private research and engineering university. Countless hours of refinement – through Computational Fluid Dynamic modeling (CFD) – led to its signature high downforce, low drag design. MIT is a participating institution in the National Space Grant College and Fellowship Program, which is administered by NASA. The reputation and engineering expertise at MIT is so advanced that a large percentage of research carried out at MIT is funded by NASA, the US Department of Defence, the US Department of Energy, and the US National Science Foundation." -------- Quite simply, products only make it out of the MIT wind tunnel and onto the market when they have been extremely well developed, and extremely well tested. Likewise, Nissan would not have run split wing technology on the R381 (shown above) which won the 1968 Japanese Grand Prix unless they were convinced that the concept was correct and proven, and you can be very sure that a company like Nissan would not have run split wing technology on their car unless they had proven the value of the split wing concept to themselves. The fact that the car then won the 1968 Japanese Grand Prix speaks for itself. So split wing technology has a history going right back to the 1960's. DETAILED TEST DATA There are three pages on the Aeromotions site with detailed data from the Thunderhill test of the split wing ... The first is the video showing the data in combination with in-car video ... http://aeromotions.com/wp-content/themes/A...vids/th_08.html The second is a summary of the data and info about the car, driver and testing methodology ... http://aeromotions.com/the-data/ The third is a detailed turn by turn data analysis here, which includes plots turn by turn of the lateral G-force, acceleration and braking G-force, velocity, and time difference ... http://aeromotions.com/the-data/thunderhill-turn-by-turn/ I will also ask Aeromotions for additional info on the split wing concept for you. - The Tuners Group

Hi LSX-438, The data from the Thunderhill test mentioned above produced the following lap times (the wing used in this test was the split wing, running in 3 different configurations): - Without Aeromotions Wing: 2 minutes 10.1 seconds - With Aeromotions Static Wing: 2 minutes 9.2 seconds - With Aeromotions Dynamic Wing : 2 Minutes 8.4 seconds - With Aeromotions Dynamic Wing With Centre Fence): 2 minutes 7.7 seconds. So lap times with the Aeromotions Dynamic Wing running in dynamic mode were 0.8 seconds a lap faster than the wing running in Static mode. And lap times with the Aeromotions Dynamic Wing With Centre Fence were 0.7 seconds a lap faster than the wing running in in dynamic mode with no centrefence. What I found really interesting there is that the simple addition of the centre fence cut 0.7 seconds off the lap time compared to running the split wing in dynamic mode with no centrefence. The centre fence is the vertical plate that runs between the centre of the two split elements - see photo above. The reason for that is that a centre fence isolates the airflow over each half of the split wing, and can have a huge effect on increasing aero efficiency and cleaning up aero flow. That then lets each half of the split wing to work more efficiently than without the centre fence. That concept is the same reason that the Boeing 747-400 and Airbus A380 run upturned wingtips on the ends of their wings. This effect was also mentioned in the Richard Hammond show on SBS a few weeks back about the development of the A380. Above is a photo of the wing tips from an Airbus A380. There is a diagram here of the effect on airflow ... There is an article on Wikipedia about that effect here ... http://en.wikipedia.org/wiki/Wingtip_device It reads ... Quite a few other planes run upturned wingtips for the same reason ... I'll check with Aeromotions to see if they have data available about the difference in performance between the single element Dynamic Wing and the split element Dynamic Wing. Given that the simple addition of a centrefence on the split wing cut 0.7 seconds from the lap time though, I wouldn't be at all surprised to see a very significant difference in lap times between the split element wing and single element wing. - The Tuners Group

Active aero is well known, and documented by examples like Nissan who used split wing active aero to win the 1968 Japanese Grand Prix. Active aero is currently banned in Formula One. http://www.drive.com.au/Editorial/ArticleD...ArticleID=64211 reads ... Formula One is currently looking at allowing active Aero again. http://74.125.153.132/search?q=cache:lXG2E...mp;client=opera reads ... The Formula One 2011 Chassis Regulations Framework - Proposed Regulations for the 2011 Formula One season which you can find here http://www.fia.com/resources/documents/177...s_Framework.pdf reads ... As it says here ... http://www.tunersgroup.com/Products/aeromotions.html ... There is also an article on The Motor Report site about the development of the Aeromotions Dynamic Wing... http://www.themotorreport.com.au/6922/aero...e-rear-spoiler/ The Motor Report's article reads ... - The Tuners Group

Hi dazmo, Active aero has been used in a number of forms of motorsport over the years. The active split wing was pioneered by Nissan on the R381 (shown above) which won the 1968 Japanese Grand Prix. This innovative weight transfer mechanism quickly proved its value. As the car turns, the wing splits to provide more downforce on the inside wheel. More info on the R381 here ... http://en.wikipedia.org/wiki/Nissan_R381 Active aero was also used with great success on the Chaparral 2E (shown above) More info on the Chaparral 2E here ... http://www.chaparralcars.com/2e.php So active aero is definitely not a gimmick, and is proven to work in lowering lap times. Testing at Thunderhiill Raceway of the Aeromotions Dynamic Wing on an E36 BMW produced the following lap time results: - Without Aeromotions Wing: 2 minutes 10.1 seconds - With Aeromotions Static Wing: 2 minutes 9.2 seconds - With Aeromotions Dynamic Wing: 2 Minutes 8.4 seconds - With Aeromotions Dynamic Wing With Centre Fence: 2 minutes 7.7 seconds. Lap times with the Aeromotions Dynamic Wing With Centre Fence were 1.5 seconds a lap faster than with a static wing, and 2.4 seconds faster than without an Aeromotions wing. You can find a video here showing the testing and lap time data from the Aeromotions test at Thunderhill ... http://www.tunersgroup.com/Products/aeromotions.html As handbrake wrote above ... "Some spend almost that on a carbon fibre lip or rear spoiler with no added aerodynamic benefit so probably not insane price for something with this level of functionality. I suspect a few track guys here would be interested in this, it seems to provide noticeable results". Additionally the version shown on the white R35 in the video is the top of the range Aeromotions S2 Wing (shown above), and is priced accordingly. Lower priced models are also available from Automotions of course. On the top of the range S2 Dynamic Wing, every component was selected to minimize weight and drag. It uses teardrop shaped uprights from an airplane, Formula 1 grade carbon fiber, titanium internals, internal actuators, titanium hardware, and extreme heat sinking. The S2 is rated for speeds of 200 miles per hour plus / 321 km per hour plus. There is also a single element version called the R2 (shown above), which is available in a static version which sells in the US for US$1699 (and can be upgraded to full dynamic mode later on), and the single element R2 wing is also available in 2 dynamic versions. Pricing on the dynamic versions of the single element R2 Dynamic Wing in the US starts at US$3249. - The Tuners Group

I smiled when I saw this thread, as we have been talking to Aeromotions about distributing their products in Australia and New Zealand for a number of months. Our arrangements with them were finalised this week, so now that it's official, we can announce our appointment as the exclusive distributor for Aeromotions in Australia and New Zealand Full info here ... http://www.skylinesaustralia.com/forums/Ae...ng-t294346.html - The Tuners Group

Hi smiley, The key is to research wheels thoroughly if you are looking for forged wheels, and to make sure that the wheels are the genuine, real deal product. There is a very interesting PDF here which talks about the differences between casting and forging ... http://www.esi-group.com/products/casting/...tips/eTip16.pdf Here is some more info about casting vs forging ... CASTING METALS http://en.wikipedia.org/wiki/Casting reads ... "Casting is a manufacturing process by which a liquid material is (usually) poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify. The solid casting is then ejected or broken out to complete the process." http://www.gmaccessorydealer.com/wheels/forgedversuscast.asp reads ... Here is a photo of air bubbles within a cast part (in this case a cast golf club head) ... Rays Engineering in Japan has developed their own highly advanced casting process with fine crystals which aims to overcome some of the issues of traditional casting methods. More info on that process can be found at the video at the end of this post. FORGING METALS http://en.wikipedia.org/wiki/Forging reads ... Here is a diagram of that process ... Here are some diagrams of a metal part (shown in red) being made using open die forging ... http://www.scotforge.com/sf_facts_forgingadv.htm has some diagrams showing the differences in grain flow between forged, machined and cast parts. That page reads ... http://www.scotforge.com/sf_facts_companalysis.htm reads ... To understand forging's effect on metals in visual terms, take a look at this very high resolution photo of a scan of a sectioned, forged conrod that has been etched to show grain flow. To take this photo, they cut a forged connecting rod in half, then etched it to highlight the grain flow ... Here's a low resolution preview photo: To view the grain structure in high resolution, click on this link ... http://upload.wikimedia.org/wikipedia/comm...edSection-s.jpg Looking at the high resolution photo, notice how the grains in the metal are very tightly packed, and they are aligned with the shape and curves of the connecting rod. This tight density of the grains, and the alignment of the grains, is what gives forged parts their strength. http://www.gmaccessorydealer.com/wheels/forgedversuscast.asp reads ... If you'd like to learn more about forging, visit this page ... http://www.scotforge.com/sf_facts_solution.htm FORGING EXPLAINED VIDEO Forging is also used widely in the manufacture of high end golf clubs. The process is equally relevant in terms of car parts. There is a fantastic online video about how Mizuno forges golf clubs in Japan hosted by Masao Nagai, Mizuno's director of global golf Reseach and Development, which reveals the secrets of Mizuno's forging process. The video has some excellent info about casting vs forging. You can view it at http://golf.mizunoeurope.com/videos/index....29_artofforging There is a very interesting video here about how Rays forged wheels are made, and Rays Engineering in Japan has also developed their own highly advanced casting process with fine crystals which you can find info about in this video ... http://www.tunersgroup.com/Videos/rayswheels.html - The Tuners Group

Hi Smiley, We are not saying in any way that people should not buy wheels that are manufactured by metal forging. These photos are an example of why people should run high quality wheels like Rays Engineering wheels. The way the wheel in the photo stood up to the extreme forces involved and survived in one piece with apparently no signs of cracking is incredible. As it says above "If you ever needed convincing of what we have been saying for years about how strong a quality forged wheel can be, and how well high quality forged wheels can resist cracking even in extreme situations, these photos are the proof." As the quote from the person who took the photos says ... There is a very good reason that manufacturers like Porsche use forged wheels like the classic Fuchs forged wheels seen on 911's for many years, and why the factory wheels on the R35 GT-R are forged wheels made by Rays Engineering. - The Tuners Group

An incredible example of the strength of high quality forged wheels ... Hi All, We're well known for stressing the fact that only fitting high quality wheels is absolutely vital if you do any track work in your car, and is just as important on a street car or daily driver. Japanese manufacturer Rays Engineering makes some of the highest quality and strongest wheels in the world. This photo was posted this week on one of the forums we hang out on, of a Rays Engineering forged wheel which despite the enormous forces involved survived an enormous crash in one piece and the person who took the photos said that it "remains intact and there are no signs of cracks". The driver who took the photos has given us permission to repost them. If you ever needed convincing of what we have been saying for years about how strong a quality forged wheel can be, and how well high quality forged wheels can resist cracking even in extreme situations, these photos are the proof. The person who took these photos wrote ... The way the wheel in the photo stood up to the extreme forces involved and survived in one piece with apparently no signs of cracking is incredible. - The Tuners Group

The only wheel studs I ever run on my cars are either german made genuine Porsche studs, or genuine ARP studs from an authorised ARP supplier ... Here are links to the wheel studs section of the ARP catalog at http://www.arp-bolts.com/Catalog/Catalog.html ... http://www.arp-bolts.com/Catalog/Catalog.PP/Catalog066.html http://www.arp-bolts.com/Catalog/Catalog.PP/Catalog067.html Rocket Industries seems to sell ARP wheel studs in Australia ... http://www.rocketindustries.com.au Project Mu make a set of nuts called the Project Mu Racing Floating Nut. It features a 'floating' collar which can rotate on the nut meaning improved contact with the wheel and more consistency when setting nut torque. They are made of Chromium-molybdenium steel/SCM435, Aluminum cap. More info on them here ... http://www.tunersgroup.com/Online_Store/pr...ating_nuts.html - The Tuners Group

Andrew Hawkins (JET200 on SAU) is the producer and presenter of these Motive DVD's. They are very professionally produced and truly great work. His company also does the DVD's for DSport magazine. Well worth checking out. - Adam

Hi Andrew, Truly great work you've been doing on these Motive DVD's and the DSport DVD's. I make sure I get every issue of your DVD's. - Adam

Hi LSX-438, What rotors, pads and brake fluid have you been running in it ? What are the rules in that category on disk sizes etc ? - The Tuners Group

Hi Martin, I didn't realise it was you guys who were doing the paddle shifter and quick release fitting - we were expecting a phone call during the install about the wiring connections but didn't hear from you. I'll stress here that particularly on custom installs like this, the parts are not a "plug and play" kit and are not sold as such. In this case, the paddle shifter was an MCR model, combined with a customised Works Bell quick release, with custom wiring required from the quick release to connect the paddle shifter wiring to the cars electrical system - so like any custom install there is always time required to do a custom install. We might have been able to save you some of that install time - we have had customers install the Works Bell Paddle Shifters in custom applications on everything from an off road Dakar style rally car to M3 CSL's headed for the Old Nurburgring to a sequential transmission WRX and even a Honda Fit. Here are a couple of photos of custom installs ... The photo above shows some custom dust seals that were made to keep dust out of the paddle shifter in the Dakar style Revo which does not have a windscreen ... http://www.tunersgroup.com/Cars/Revo.html There is a photo gallery of other custom installs here ... http://www.tunersgroup.com/lightboxes/padd...fter/index.html I'll give you a call about the wiring connections tomorrow. This is the first R35 to have this custom setup fitted. Great to see you got it installed and working well. You guys clearly know your stuff - the install looks truly great and is very clean - hats off to you guys on doing a such a great job ! I definitely wasn't trying to take credit for the time you guys spent in custom installation - we simply spent a lot of time on this setup too - The Tuners Group

The car has been built for track work and tarmac rallies. All the steering modifications are bolt on modifications, so if the owner ever wanted to turn it back into a road car the steering modifications can all be unbolted and reverted to stock. In terms of the flat bottomed steering wheel, the reason many people use them is not for a trend or cosmetic reason, but because the flat bottom wheel provides more clearance between your legs and the steering wheel, which can be an issue for taller drivers. That's why so many competition cars run D shaped steering wheels, particularly in JGTC, V8 Supercars and the like. - The Tuners Group

Hi Martin, We spent quite a bit of time figuring out the right combo of parts to make the paddleshifter and quick release combo all work together on this R35. The big issue on an R35 with a quick release is ensuring the right combination of parts so that the steering wheel does not sit too close to the driver, and so that the wiring for the paddle shifter is all concealed. This car runs an MCR Paddle Shifter (which is actually manufactured by Works Bell), with one of our black Works Bell Rapfix II Quick Releases. Behind the Paddle Shifter sits a black Works Bell Rapfix II Quick Release, fitted with the Works Bell 4 Terminal Insulator Conversion Kit (The standard Rapfix II has 2 electrical contacts). The 4 Terminal Insulator Conversion Kit allows the paddle shifter to be connected through the quick release, with no messy external wiring, and allows the paddle shifter and steering wheel to be simply removed as one assembly. Note the 4 electrical contacts on the base of the Rapfix II quick release in the photo above. The yellow flipper is a Works Bell Flipper For Rapfix II Quick Release but the yellow version for JAF & N1 racing regulations. Many classes of racing require that the release mechanism for the quick release is bright yellow, which is why the yellow version was used on this car. Also note that the car has a special Works Bell short boss for the R35 which compensates for the length of the quick release and helps ensure that the steering wheel does not sit too close to the driver. Here is a photo of the standard length boss that comes with the MCR Paddle Shifter ... By contrast, note the short length of the Works Bell short boss for the R35 below, which allows for the length of the quick release ... The Works Bell short boss for the R35 is just 40mm deep from the steering column. If we were looking at a setup like this again, rather than the MCR Paddle Shifter we'd likely go with a Works Bell Paddle Shifter NEO Universal (pictured above), which is a racing product that is just 20mm deep. That would allow for the most compact setup. In this cars case the owner of the car already had an MCR Paddle Shifter, which is why the MCR Paddle Shifter was used on this car instead of the Paddle Shifter NEO Universal. In terms of why the MCR Paddle Shifter looks similar to the Works Bell Paddle Shifter NEO Universal, as it says in this thread about the universal version of the Works Bell Paddleshifter ... http://www.skylinesaustralia.com/forums/Wo...er-t240837.html ... Like the other modifications on this car, there has been a lot of attention to detail put into the steering setup To share what we have learned from this car with the SAU community about the required parts to make the quick release / paddle shifter combo all work on the R35, we have an article about the steering setup in this car on our website at ... http://www.tunersgroup.com/Cars/gtr1.html It took quite a bit of time to figure out the right combo of parts to make it all work, so we're more than happy to share that info with the SAU community. - The Tuners Group

We have been sorting out aftermarket seat mount options for one of our R35 customers this week. Another option for side mount seats which we've been looking at for our R35 customer is the Momo Side Mount Brackets shown above. They have been used by racers for years to mount seats in custom applications. I have a set of the Momo side mounts in one of my cars attached to a set of Porsche sliding rails. So with that setup I have back and forward sliding adjustment through the factory sliding rails, and angle adjustment of the seat (to set how upright the driving position is) via the Momo Side Mounts. If you look at the mounting holes in the horizontal surface of the Momo mounts in the photo above, they are slotted, so in many cars they can be bolted to a set of factory sliding rails very simply. I have even seen people use the Momo mounts to mount bottom mount racing seats - an engineer I know made an alloy cradle so that an OMP bottom mount seat could be bolted to Momo side mounts so that the seat could have adjustment of the angle of the seat to get the perfect driving position. The Momo side mounts are available in both a steel version and alloy version. More info here ... http://www.tunersgroup.com/Online_Store/Mo...Side_Mount.html Momo also make universal seat slides (shown above), we are checking for our R35 customer to see if they can be used on the R35. More info on the universal sliding bases is here ... http://www.tunersgroup.com/Online_Store/Mo...eat_Slides.html - The Tuners Group