im not sure which ones to choose i hear alot of good about ZZP and some bad... what do you guys think and is hahns price a rip off? i already have the hahn catback and it mounts up to the stock downpipe will it fit the ZZP

 

zzp is supposed to be an amazing bang for the buck... what bad things have you heard?

 

nothing to bad just that there cats are clogging alot

 

you can't blame that on zzp.. blame it on magnaflow it unfortunately seems they've been having alot of issues as of late.. bad cats bad resonators...

 

No cats FTMFW!!!!!!!!!

 

i have the hahn header and its not bad but i need to get a tune

 

I have the hahn header, it's ok, the outside looks super, the collector is a little harry.

 

can you buy the hahn header and dp to fit the gmp exhaust or will the hahn header and dp only fir the hahn exhaust?

 

I heard the quality of the Hahn is amazing and the sound. But the price....just detours me away. Only if they were cheaper.

 

i know but will it fit the gmp exhaust ive heard noithing but great

 

u are talking about the header/dp combo right?

 

i have the hahn 3 inch catback its reall nicee.. just to big for our cars and if u add a header and dp. you are gonna loose more power. stick to stock or u better get more supporting mods like a intense stage 5 kit or somethin . unless u dont care about speed

 

i just wanted to know how much hp you would gain goin with the hahn header and maybe a price for it

 

How do you came to the conclusion that upgrading to a big 3" exhaust on your stock Cobalt will gain something ?