sonicii

fair call, but the going price of a '16 RS is around $30k. also don't think you have any chance of finding a '21 400R for close to that figure. If you find one.. sign me up!

That shoots down the suggestion they are a similar price to a 5yr older Q50 RS. if you pay that price for a 2016 RS you would have rocks in your head.

As far as I know, Infiniti stopped importing vehicles before 2020, even though they were still selling their stock for at least a year or 2 after that, they were older build years, therefore, you can import a 2020 400R, because you couldn't buy an AuDM 2020 built Q50 RS. As for insurance, you might need to go through one of the enthusiast insurance companies, they tend to insure a lot more grey import models than the mainstream insurers as Duncan mentioned.

The existing factory sub feed should already have a sum of L+R and a low pass filter, so it probably isn't necessary to take another L and R feed from the HU. If it didn't have a factory sub output, then that would be the best option though. Does your new amp not have speaker level inputs? that would eliminate the need for the speaker - line level converter completely.

I would just use one channel, if you use L+ and L-. I would connect the R+ and R- input wires together, since it seems to have a 12V input, it might have some small preamps in there and you don't want them sitting with open circuit inputs.

I would sign up to www.infinitiq50.org ask there, plenty of owners on there that may be able to advise of any common issues. The 400R is just a red sport with a few extra cosmetic changes, so mechanically they will be the same. Which coolant are you seeing leaks with? the engine coolant (which uses a belt driven pump, part number 21010-4HK0A), or the intercooler/heat exchanger coolant, which uses 2 electric pumps. For a parts listing, try this - Nissan Infiniti Q50 with V37-RHD frame, 06.2016 - ... - Genuine parts - Amayama

Pretty sure the 2016 Q60 was still the V36 chassis, so I suspect a V36 370GT exhaust should fit ok. A complete muffler delete would be pretty noisy; would it pass the WAF?

Sounds like a typical Nissan dealer response. Of course they can do diagnostics, they just need a Consult 3+, which every Nissan workshop will have. They just don't want to because they are lazy and don't want to deal with any issues that pop up which they aren't familiar with and don't want to work on cars they haven't has specific training on. This is the list of workshops that used to be Infiniti workshops, and are therefore willing to help. INFINITI Auto Repair & Maintenance | INFINITI Australia

Many items, especially engine parts are shared with locally delivered models, so shouldn't be too hard. otherwise, try amayama.com

There was a thread a couple of years ago, seems the consensus is, it's a common fault, but no guarantee you will see the issue. If you are buying an Infiniti, then it will be 2012 or newer as that is when they were sold in Australia, I am fairly sure they used a different gasket by then, so you shouldn't be seeing this issue. If you are buying an earlier V36 Skyline (370GT), then it could still be affected.

I can't really say what is best for the VR30 as I don't have one, but I know plenty of people have said things about oil weights in the past without a whole lot of evidence, so I would be wanting some empirical evidence that 0W-20 is causing problems before I go with a different oil weight. Plenty of people have told me the recommended 5W-30 oil is too thin for the VQ35 in our warmer environment, yet I have been using it in a V35 skyline in North Queensland since 2011 without issue. Based on the manual you posted, it looks like 5W-40 will be ok, but no idea if it would be 'a better choice'.

I don't know for sure, but I expect the recent model V37 400R (or RV37) is pretty much identical to the recent model Q50 RedSport with the differences being cosmetic. (and ignoring the fact the new model Q50 RS is LHD only)

It has more than mine does, you get a wheel brace at least, mine just has the tow ring. There is no spare, no goop, no jack, nothing in these, they come with runflat tyres from the factory. I bought a 370Z donut (which clears the akebonos), a jack and wheel brace for mine as I had normal tyres fitted last time. I just throw them in the boot if I am going out of town.

spark plugs are just NGK LFR5AIX-11 for the iridium, or PLFR5A-11 for the platinum. you should be able to get these just about anywhere.

I swapped my ball joints about 4 years ago, I bought the SPD ball joints from conceptZ, they are still working, but the boots fell apart after a few months. I notice they don't sell these anymore, maybe that is why. I ended up buying the replacement poly boots, which haven't split, but they open a gap when the suspension compresses, so I don't recommend them either. No idea about the Mevotech ball joints.. I would be surprised if you can't find these ball joints locally too, just search for 350Z rather than V35 That said, if you are going to the effort of pressing the ball joints out/in the steering knuckle (which is a pain of a job), the why not just also go with new bushes in your current LCAs? you can get the superpro poly bushes locally. Shock Absorber Lower Bush Kit (fulcrumsuspensions.com.au) Control Arm Lower-Inner Bush Kit (fulcrumsuspensions.com.au)