4" catback for R32 GTR

[Coombsy]

Looking for a 4" catback for an r32 GTR. Don't really care what brand....Would prefer if it was in Alberta but will consider having it shipped in.

[Bruizer]

For my 800whp build I have a 3.5" exhaust.

What you want will need to be custom since a 4" won't fit under the car if it's round (flat 4" works) but I have personally seen the raw brokerage 4" exhaust and though I hear they're around $2000, They're nice. FYI. There are some 1000hp cars around with 3.5".

[Coombsy]

I'd consider 3.5, but I'd like to have the whole exhaust match my dual 3" - single 4" down pipe if possible. If I can't find one, I'll probably build it myself, but would rather save myself a lot of labour.

[nick-nismo]

thats not really true that it wont fit under the car, i built a 4 inch straight pipe catback, and i have just as much ground clearance as i had with any other brand name 3inch catback, im on 17's too, sitting level with the fenders. its all in how your build it.

[Dragon Humper]

My 4" fit so well that I was kicking myself that I didn't go 5". If you custom build it yourself then you can get it to fit super tight. I went that big because I was funneling all the exhaust out the back. Wastegate was plumbed back into the exhaust because I think venting to atmosphere sounds horrible...but that's just me.



Jon.

[Bruizer]

Interesting. Most of the 4" systems I've seen sat low enough to beat the downpipe to crap along with the muffler. My 3.5" which is stock location has the same 2 spots quite low when I could easily hit them before anything else. I guess custom means custom.

Jon you find a 34 yet? Heard you sold your 32

[Black BNR32]

Hey Coombsy, front pipe from my 4" system is available. see my old thread.

[Coombsy]

I'm thinking about custom making one. It's just tough finding 4“ stainless mufflers that aren't like a foot in diameter because they are made for a semi.

[nick-nismo]

Vibrant makes a good muffler, I'm planning on adding this to my 4'' to reduce noise, strait pipe is far too loud

http://vibrantperformance.com/catalog/product_info.php?cPath=1022_1031_1052&products_id=1166

[Black BNR32]

I run a dynomax. magnaflow has one too.

[Dragon Humper]

You could try a quarter wave tune pipe as well, used one on my truck and made a world of difference. It's just a pipe that branches off at 90 deg. to the exhaust pipe with a length of about 20" (depending on what frequency you want to dampen) and capped flat at the end. Use about a 2.5" dia. pipe. Google quarter wave exhaust pipe and you will come up with a ton of DIYs and the formulae to figure out what length you need.


Jon.