GT-R Front Pipes

[lwells]

Ok, stupid question time

My R32 GT-R's stock front pipes have seen better days: rusted and leaking. So its time for a replacement.

I have been tossing up between just sticking another stockie on, or going for an aftermarket. Ultimately I want to get the Trust split front/dump setup, but can't afford it at the moment. The car is also running the stock dump pipes.

On to the stupid questions.... What are the diameter measurements for the stock front pipe? If I get an aftermarket pipe with say 2 x 70 --> 80, is that going to be able to be mated to the stock dumps (ie. does the flange stay the same, even if the pipe size increases)?

Finally, has anyone had any experience with the Blitz GT-R front pipe?

Cheers,

Lucien.

[Squizz]

I run stock dumps with 2&1/2fronts. Works ok.

[Beer Baron]

my advice. with GTR front pipes. they are such a simple piece of kit a blitz one will be very similar to an HKS one, which looks exactly like a 5-zigen one which looks like a Liverpool exhausts one. etc etc. the only difference will be: mild or stainless, pipe diameter and some may incorporate a felx joint. no matter what they will bolt up to the stock dumps and whatever cat you have on there. the pipe size inceases but the flange stays the same.

I reckon just save your pennies for the trust dumps/fronts. from what i've seen they look to be the ducks nuts.

[Blitz]

I am using the Apexi GT stainless front pipes - very well priced IMHO, high quality and work well.

[lwells]

Richard,

Arr.. if the flanges stay the same, that's good news.

I agree in regards to the front pipes: they are all very similar. I could get used stockies for $50-100, a used mild steel aftermarket for like $150-250, or a used stainless for $250-350. For about a good priceI can get a new Blitz tuned length in stainless steel (plus I think it has the gaskets), hence the temptation.

/me looks at Nick's nick and shakes his head

What are the Apexi's worth roughly?

Lucien.

[Ronin 09]

I'm running Trust dumps. The trust ones are quite heavy though... just thought i'd add that

[Beer Baron]

most dump/front combos are quite heavy though by the time you add up two dumps and the front pipes. how much heavier do you reckon they are over stock? also how much heavier over say a set of HKS dumps and some A/M front pipes.

[lwells]

I'm running Trust dumps.  The trust ones are quite heavy though... just thought i'd add that

You mean dumps or front pipe? Or both (ie. the Greddy Ext. Front/Dump set)? Trust also has (or had) their own front pipe (called the MX) hence the confusion

I'm only looking at the front at the moment as I don't have time (or money) to pull the whole exhaust side apart again to replace the dumps.

Lucien.

[Beer Baron]

Roni has the newer trust dump/front combo. yeah the trust MX pipes are not too expensive either from memory.

[lwells]

Roni has the newer trust dump/front combo. yeah the trust MX pipes are not too expensive either from memory.

In which case I would be interested in the weight comparison too. Perhaps its just because the front pipe section is considerably bigger on the Greddy units?

Lucien.

[Ronin 09]

In which case I would be interested in the weight comparison too.  Perhaps its just because the front pipe section is considerably bigger on the Greddy units?

Lucien.

Now that I think about it, the Trust dump / front extension pipes I have may be only a little heavier.

Consider that the original cast dumps are quite heavy, then the front pipes are relatively lighter

The Trust extension I have is all stainless of the same thickness - so must be as thick as required at the dump end all the way along - whereas I would imagine that the MX front pipes would be thinner as it is further from the exhaust housing and thus subjected to (slightly) lesser heat.

Did that make any sense?

[Duncan]

While I don't have actual power figures to back this, the standard r32 front pipes are apalling. 10mm narrower each than the 33 and 34 standard pipers....tiny....

[Dash]

The ID of the 2 primary pipes is around 47mm and the ID of the collector is 67mm

Both sets of flanges have a PCD of 105mm,I just measured these with a tape so they may not be exact.

You''ll find most 2 bolt gaskets will have the same PCD, when I fitted a bigger set of front pipes the local exhaust shop had all the gaskets in stock.So the size is quite common.

My new pipes are 60mm front 75mm collector and to be honest I didnt notice much difference in performance.I'd wait and get the Trust ones they look great!

[lwells]

just: very useful info, ta.

As I said, I just don't have the time for the Trust/Greddy units: having to pull everything out to replace the dumps is a massive hassle (I only just a fortnight went through the whole turbo/manifold removal too thanks to a leaking gasket).

If the leak wasn't bad I would consider just ignoring it, but the leak/s are very noticable.

Lucien.

[Blitz]

Lucien, the Apexi GT front pipes are around $690 retail, made in stainless

[doubled]

CES dump pipes

good quality Australian MADE!!!

[Squizz]

CES dump pipes

good quality Australian MADE!!!

[Jago]

just a question. Is there such a thing as titanium dumps/fronts? Or would they just not work due to the heat stress or something?

[lwells]

SPHYNX[x']just a question. Is there such a thing as titanium dumps/fronts? Or would they just not work due to the heat stress or something?

They certainly exist: ARC makes a titanium front pipe, and these ones are constantly for sale on Yahoo JP. Only problem is none of the titanium ones seem to be the split design.

I haven't come across titanium dumps, however.

Edit: I would imagine that titanium dumps would cost a fortune given the thickness of metal required.

Lucien

[PSI_GTSII]

How hard is it to change the Dumps (from Underneath) when the front pipes have been removed...?

As my GTR only has a Cat back Exhaust and I'd like to do both at same time if possible...

And whats the general consensus on getting an exhaust shop to make up some bigger front pipes for the R32 GTR...?

All these 'Bolt On' parts are new to me yet I've had no problems in the past with Local Exhaust shops exhaust systems..!.?