Do they make a 2.5 with a highflow cat? Im looking at the website and I see a 2.5 but it doesnt say if it has a cat or no cat? Its the one for 249.99? Also, is this a good downpipe? My magnaflow catback is 2.5 so I figured a 2.5 downpipe would be good too. Or do you guys think a 3 inch with a tapered end with a 2.5 flange?

 

yes they do... gotta check off the options in the boxes...

 

I'm running the straight 3" w/cat and it bolted up no prob. no leaks

 

Is it good quality? Any reason you choose theirs instead of ZZPs?

 

Well the zzp one sounds pretty crappy a friend of mine has it and I don't like it at all, I deal with c/a alot and they've always done good by me (I'm there at least once a week)... plus I've watched them make them in house and have never heard a complaint about them. most of the cobalts out here are running one or buying one too...
I like mine... def deifference in sound and performance, and they drilled and welded in an extra 02 bung for my AEM.

 

Cobalt Addiction has one too.

http://cobalt-addiction.com/performance.htm (click on headers)

 

that is the cobalt-addiction one we are talking about.

 

I have the CA XTC 2.5 Downpipe w/ cat on mine right now. I love it. Once it warms up it sounds great until the higher rpms and of course it will it be a little raspy. Also felt an increase in performance also.

 

Would there be much of a benefit of going with the 3 inch down pipe if I have a 2.5 magnaflow catback? also if i stick with the gm extrude and honed manifold??

 

bump

 

yeah,,, you get the higher flowing cat which helps a decent amount... plus it helps the manifold out as a bigger collector

 

So should I shoot for a 3 inch for a 2.5 flange? I just didnt know if that would be kinda dumb with a catback thats 2.5

 

bumpity

 

Go with the 2.5"
You won't see much gain with the 3" DP if your exhaust is 2.5"

 

yeah i would do the same size all the way.

 

true.... since I'm goin with 3" I"ll stay with 3" d.p. I can't see it hurting though

 

what about that cat? Will it sound really raspy without it?

 

my guess would be at higher rpms....probaly a little more than with a cat. but im not sure.

 

From experience (inhale's car) it sounds like a honda without the cat,,,, Idunno mine sounds fine w/ cat no raspyness... might be different with an eftermarket exhaust, but I can't see it... I know it will sounds buzzy w/o the cat.

 

i better stick with the cat then.