recently, I got my 2.5" DP from Matt (which looks great). My current exhaust set up is the RSR 2.75" catback. I have yet to find a company that manufacture 2.75" cats (anyone that find one let me know).

My question is this:

Should i set it up as 2.5" Dp ===> 2.5" cat ===> 2.75" exhaust

OR go with a 3" cat...?


I can't believe I'm posting a question about exhaust options...Guess there is a little bit of Noobness in us old members.

-K-

cat? is that the thing that went into the garbage

well, id go with the DP to 2.5" cat and try to open up the flange on the back end to get it closer to 2.75.

I take it you are turbo or have done some mods to the car in order to increase the air flow in order to need an exhaust larger than 2.5 right?

-97 GS (First project, 299 whp)(sold)
- 97 RS 2.6 last numbers: 306hp, 352tq @16psi (Dead, parted out)
- 99 GS OZ, Hahn Kit, 56k miles (Sold)
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- 00 Nissan Maxima GLE (Daily Driver)
- 02 Audi A4 1.8T Quattro

yes it is turboed, and yes a cat is required to keep it civilized in the great state of california:puke

2.5" dp===> 2.5" cat flared to 2.75" adaptor was what I was thinking as well.

-K-

come on Mr. 5psi... 2.5" cat.. or just go crazy like james haha..
Michael
99gs HRC Stage IV 8-Injector Setup
2GNT Member #32

Use james' gutted/melted cat!

Just weld in a 2.75 pipe so it's a straight-thru setup, I bet it would fit perfectly in that 3" ID cat shell

Well I have mine to a 2.75 ish Star DP =>2.5 test pipe => 2.5 exhaust.

Make sure the gaskets dont disrupt the flow that much and even the step from 2.75 to 2.5 looks too ghetto ish for me. If you can get the Catwith some reducer flanges that would be ideal.

Member # 751


FOUNDER of the Central Cali chapter of 2GNT!
(I got kicked out after I refused to go Cow tiping) - Hehehe you know who this is for