shroogis

iTrader: (1)

Yep, you. Definitely makes a difference. Besides the point, your exhaust sounds perfect!

ChriSS/SC

Thanks man... And yeah I agree that catless does not sound good on ss/scs at all...

shroogis

iTrader: (1)

<-- catless, FML

ChriSS/SC

lol what made you go catless? Do you like the sound?

shroogis

iTrader: (1)

Dude, the sound is ******* horrendous. It sounds sick at WOT because it's so loud, but at 3800 rpm barely accelerating there is this terrible rasp. It sounds more ricey than a honda.

I went catless because the guy I bought my CIA header from included a catless downpipe

ChriSS/SC

lol I definitely feel for you man.. I knew I'd never go catless w/ this car...

shroogis

iTrader: (1)

Trying to decide whether or not to put a cat in it and leave the muffler I have or leave it catless and get a dynomax super turbo

Macgyver2484

iTrader: (3)

Does anyone know the GMPP pipe diameter?

Staged07SS

iTrader: (25)

If you search you will find out easily, because it has been covered a million times !!

The GMPP catback exhaust piping is 2.25" o.d.

Macgyver2484

iTrader: (3)

Isn't that smaller than the stock pipe for the turbocharged model?

Staged07SS

iTrader: (25)

Why are you worried about the Turbocharged models exhaust size ?? They don't make a GMPP exhaust for the SS/TC, but to answer your question yes it is. It is also smaller than the stock exhaust piping on the SS/SC for the most part, but it flows a hell of a lot better.