zebt66

I have been lookign all over the place for a 3inch or 4inch exhaust system for a GS300 and can't find anything i give up! Anyone know of any Manufacturer who makes one? complete catback!!!

Thank You
Zeb

jcat_350

nobody makes one. You'll have to get it custom made at an exhaust shop, which likely would be cheaper anyways. Don't bother with a 4inch exhaust by the way unless you're stroked to 3.4L and running like 30psi of boost. I wouldn't even bother with a 3" unless you're over 10psi.

5t341th

iTrader: (16)

custom is best.
4" if you got mad boost
3.5" is fine

jcat_350

even 3.5" is overkill unless you're over 20lbs.

edinburger

http://www.lextasy.com/gs300_gs400_e...ems_33_ctg.htm

edinburger

http://www.maxpsi.co.uk/product_info...xhaust-systems


http://www.tanabe-usa.com/

edinburger

i have custom exhaust system cat back with 4" . here are some pics and sound clip

Frankdorn

iTrader: (7)

You want a 4" cat back...as in 102mm diameter? You'll have to share with us how you did the DuraMax Turbo Diesel swap! Did you make your own engine mounts? How 'bout the tranny--Allison? Retrofit duallies and shave the rear fenders?

5t341th

iTrader: (16)

those 4" tips or 4" piping?

edinburger

oh ok

mine is 4" tail pipes with 2.5" cat back pipe

zebt66

I have a 2jzgte VVTI swap built with gt40-67, built 4 speed aristo tranny pushing 21 psi daily driver

sleeper408

iTrader: (6)

That sounds like it's making good power. I'm wondering if 4" would still be overkill though.

JeffTsai

iTrader: (1)

I'm running a 3.5" downpipe right now and I think it's holding me back a bit. Maybe time to upgrade to 4"

ROPADOPA

I got one for you. Im running 3 inch from the turbo back then split into dual 2.5. How does that calculate ?

macd7919

iTrader: (10)

It would flow as much as a 3" exhaust.