joes407

ive got the gmpp catback and was tossing the idea of the gmpp extruded downpipe around. any input from the people that have em would be appreciated.

syP

I assume you meant to say GMPP extruded honed exhaust manifold?

If you are sticking with your warranty, that is obviously the best/safest thing to do

joes407

yes of course im stickin with the warranty and that is what i meant. i didnt think off brands killed the warranty if the dealer put on the parts unless those parts screwed up.

N8s07SS

I think it depends on the dealer.

07cobaltss

yeah my service manager always tells me. "i dont care what you do to the vehical, hell it really doesnt phase me, just take off anything that YOU think would be an obvious void of warrenty item before you come and see me" even then he said if it gets here and i know its going to void the warrenty i'll tell you and just bring it back another day when it has disapeared.
but i like the Jbody header... ****** wicked lookin. but if you want warrenty GMPP isnt a bad way to go. you WILL see gains either way you go.

MacG321

the clear image header looks like a nice 2piece combo. I believe someone dynoed before and is waiting to install the header/dp to see the results.

CobaltSS313

i got the cti header but if you want warranty stick with the GM Honed manifold

Maxim_X

For bang for the buck cobalt addiction has a header that gives about 10 horses for 200 bucks.

The best is the JBP vortex by far.