Bout to order GMPP Exhaust and want to get a downpipe to compliment it. Whats the best??CAT or NO CAT that is the question..lol..thanks

 

Well I don't know which is the best but I run the XTC 2.5" downpipe with a CAT and it bolts up nice to the GM exhaust. No issues at all.

Definitily get a CAT no matter what downpipe you pick.
Your exhaust won't sound as raspy and you can pass emissions.

There is a pic of the XTC downpipe in my garage.

EDIT: Here is a link to the downpipe. Just click on HEADERS

http://cobalt-addiction.com/performance.htm

 

Good Point..lol.. thanks

 

Anytime mang. Good luck.

 

I have had tow xtc d/p's when i had my car, one with cat, to loud for me, and without, which my car was pushing to much boost for a cat and melted it, but either way xtc is a good choice.

 

do u got to get a down pipe wit the Da Gmpp exhaust system? or will da downpipe just give u more horsepower and how much?

 

Go with ZZP.

They have top quality products and excellent customer service.

 

any links to purchase the ZZP downpipe?

 

Agreed I have ZZP 2.5 down pipe without cat, including the ZZP Header. It has an awesome sound with the GMPP Sport catback.

Their site is under the Vendor Index

 

please do not talk like we live in compton off of welfare checks

 

compton ftl!!!

 

 

you might want to think about a header or the GM honed manifold while getting the downpipe and exhaust. you can get it all done at once.

 

My C/A dp is rusty as hell and the flex pipe is busted and more exhaust is leaking through the flex than escaping through my tip, not too impressed with it, havnt had it on 6 months, comes off hopefully thursday.........

 

Well i oredered the xtc downpipe like a week and a 1/2 ago from CA and no word from them yet..IM PISSED.. got my GMPP performance exhaust from CED in like 2 days though ..so im NOT to happy with CA..the exhaust is GREAT.. I love it..thanks everyone, so now you bash on me

 

I'm kinda in the same boat. I ordered their stage 4 kit about a the same time. It maybe because of the holidays. They are a good company so I'm being optimistic

 

thats the way i tallk im from philly, pa...is there a problem??...i just ask a simole question about the tread thats all...

 

Yeah, I think I am going to get a ZZP downpipe when the time comes, just my .02

 

Go with ZZpeformance.

 

Does the ZZP bolt driectly to the GMPP sport catback?

 

yes

 

Would the zzp downpipe bolt to a magnaflow catback or will the piping size matter? I read some reviews off of the zzperformance website on this downpipe and people are saying it whistles whenever they get on the gas with the high flow cat? They even said they couldnt stand it so they put their stock cat back on.

 

What size is the piping of the magna flow? It may depend on that.

Either way I think it will. They have a 3in and 2.5 version

 

the zzp is sweet