I have a 08 Cobalt LS five speed it has a injen muffler and a injen CAI. I was wonding what kind of headers would be best and what i should get to get the max horsepower i could gain from it.

 

never heard of an injen exhaust? full catback?

 

Injen exhaust Muffler or Cat-back?

 

Well you obviously need a set of Injen headers to complete the set-up!



....

 

its just the muffler not a full catback

 

dose injen make headers for GM?

 

No he was just pulling your leg, because you took us by surpise with the Injen exhaust for a Cobalt.

 

You may think its funny, but it acutally turn out greet and sounds very good. Can someone please just answer my question instead of making fun of me?

 

noone is making fun of you. im pretty sure noone has heard of injen exhaust lol

 

you want a better answer?

Ok.

First put a true catback on your car the LS has rather small factory piping on it.

Second ZZP Hahn Clear image and a few others all makes good headers.

 

ZZP midlength header with 1.5" primaries, and 2.5" exit with ZZP downpipe. I would also recomend 2.25" tubing from the downpipe to the injen muffler.

Also we are not making fun of you, just giving you a hard time, thats it.

 

Thank you so much and i dont even think i should be asking this question, but how much horsepower do you think i would gain if i do what you just told me?

 

oh and to save some money, just buy one

 

seven

 

Maybe 8-10 hp. Not to sure.

Alot more with a tune.

 

I was going to try trifecta tuning and the guy i email told i would only gain about 10 horsepower for the tune. Would gain more if i got headers and then a tune?

 

You will benifit more with full-bolt on's before you tune. Just depends where your want you powerband to kick in.

 

you need to do some research in the 2.2 forum...

 

Ok thank you for you help.

 

yes get bolt ons then tune