What would be a list of engine modifications that i could do to my cobalt without the dealership voiding my warranty? So far all i have is gmpp cold air intake and custom exhaust system.

 

Pertaining to the custom exhaust, be careful. Some dealerships will threaten to void your warranty if it's not GM. Anyway, here's the list as far as I know. It's pretty short...

GMPP Intake
GMPP Catback
GMPP Extrude honed exhaust manifold
SS/SC downpipe

Maybe there's more, but if you want to be completely safe then you can't really do much other than that. I know people following this post will say Magnuson-Moss Warranty Act, but whatever. It's your call.

 

just buy what ever you want and when it breaks put it back stock thats it

 

^^prolly not the best idea