I just got a 2007 silverado 4x4 that still has some factory warranty left and I also bought an extended warranty thru GM (I think its called ezcare). I would like to do some small mods on it like dual exhaust and a cold air intake. Will this void my warranty? Also any suggestions for these? For the exhaust I was thinking 50 series flowmasters and just have the local exhaust shop bend the pipes instead of buying to kit. Sorry forgot to say hi I posted on this site a long time ago so i thought I should just say hi again.

Also this truck has the 6.0 vortecmaxx and gets horrible milage on my dayly commute.

 

Your warranty will be fine.....I have the same exhaust your looking at and it was locally done along with a CAI. Dealership has never even batted an eye at it