so which one should i go with....?....and do these headers make a noticeable difference in sound?.....any one with experience on these personally?....and also where is the cheapest place to get them?

 

cobalt addiction header is way better than the gm one the gm header is only increased flow by 30 cm

 

cobalt addiction header..but do u wanna keep ur warranty if anything mite go work with the C/A header and damager your car. but yeah u will get better flow with the c/a, not gm.

 

i have the cobalt addiction header, definatly the way to go.....the tubes have a better flow, good ****

 

you can get both from cobalt addiction.

 

I've heard the CA header doesn't fit 100% and you may have an issue with heater hoses or something. If anyone with the header can clear this up it'd be great.

 

yes, it does press slightly against the coolent hose on the back of the engine forcing the fluid to come out, needed to be headed and slightly formed

 

On a scale of 1 - 10 how bad is it?

 

well I have it on my car and no fitment problems... but if you do, you can rotate the coolant line so it doens't make contact... no big deal at all..

 

yea, u can rotate it, did the form just to be sure

 

so did it make the car sound any better?.....also is there a notcieable difference in performance?

 

power gains from a header are never rlly huge, u mite get like 5 - MAYBE 10 hp out of it...id say at the best 5 - 8.....but sound wise...makes it a lttl deeper, should go with a downpipe to though to get the most out of it, with an exhaust of course

 

kenny tested his header on a 2.4 in a HHR and it put down 10whp.

 

ah, rlly damn....good ****

 

the fitment isssue is only for the 2.2 seen this in one other thread

 

yea, cuz the 2.2 has the air return valve, noone makes a header for the 2.2

 

u can put on the GM one and shud not have a problem. its a good design of a header and really affordable(c/a stuff). i will prolly have it on my car too, soon. cant beat havin them just down the road.

 

the gmp header looks exactly the same as the stock ss s/c header when i took it off, when i had the 2.2, didnt look like they put to much effort into make that header, with the dents in it an ****

 

if u put a lsj header on a 2.2. that wub a big difference for a 2.2. but the GMPP one is not the best header for gains for a 2.4 or 2.0.

 

if u put a gmp header on a 2.2 ur gonna throw a code....because u have to unhook the air return bullshit valve

 

only on some of them (cali emissions)

 

yea, i got stuck with one of thse bastards when i had my 1st cobalt

 

the gm header is the same as the 2.0 header cast iron but that gm header is extrude and honed more. but its a waste so go with the cobalt addiction one i am.

ryan.

 

I've got the GMPP Manifold...it's not a waste to me at all, I could feel the difference when i first put it on, sounds great and no warranty or fitment issues.

 

waranty is the only reason to get the gmpp... anything else will out flow it, but runs the chance of having your warranty voided