I got it installed by a shop and they did the pipe dent thing, but when i accelerate as it gets above 2k it starts to make this buzzing sound. It increases with the rpm and sounds kinda like a buzz with more air. is it just the better airflow of the header or should i get it checked out? i have a k&n sri and the v1 as mods. i havent installed the xtc header yet so im kinda lost on wut it is.

no takers?

 

check it out, mine was doing the same thing so they messed with the exhaust hangers.....went away for about 5 min then came back

 

mine also did that. it went away after a few days so i just figured it was gettin broke in.

 

do u still have it now or is it gone? i didnt notice it the whole day yesterday cuz i had the music up but today i wanted to hear the header and intake and it started to really **** me off

 

its still thier....do u have a big muffler cuz that would cause a problem

 

nope im stock on xhaust

 

oh it could also be were the dp connects to the exhaust, might need tightened all the way, i assume u got little springs to take place of the flex pipe and that could be the problem

 

hmmm idk illl take it back and get it checked out.

 

two words bro. exhaust leak..u have it coming at the header flange to the stock downpipe. get that downpipe on and it will fix it. there is not much room on the two flanges for the gasket to sit properly and you will get a leak...when i put my downpipe on no more leak.

 

are u serious? thats it? gay its freaking annoying.. but i dont feel like ive lost power and my gas mileage is still goin up..

 

i had the similar problem..the ca vs1 header flange is a totally different shape agaisnt the stock downpipe flange and the gasket they give u wont really fit properly and can let out a leak...i used a gasket maker and it fixed it until i got my downpipe

 

how much did that cost ya?

 

Hm, I dunno. I've had my CA v1 header on since November '06 with no problems. Sorry man wish I could help.

 

has anybody's paint come off of it completely? wtf y do they paint it if its gonna do that? the stuff underneath doesnt even look bad.. and y couldnt they just use the 1200 degree paint if anything?

 

lol, not all, but most.

 

Never had a problem with the CA header when i owned it. Gl with a fix.

 

Most of my paint is off but w/e I like the metal look better anyway. And a decent DP should run around $200-$300 with a high flow cat.

 

the shop did the dent thing for mine too but i dont have the problem, get it checked out see what it is

 

y wud they do the dent thing..not needed on the 2.4 cobalt..only 2.2

 

the shop guy said that's the only way to fit it in......weird

 

hmm odd. mine fit on like a glove.

 

i had the pipe in the way also.. it started leaking before they dented it... i took it today and they said it was just an echo from the header.. hopefully itll go away when i get the engine/tranny mounts in and the dp