I have FlowMaster Force II's on my car. They sound great! Headers will void your warranty because you'll have to tune out the code they'll throw.
MY RIDE: 2011 TRIPLE BLACK SS CONVERTIBLE (LS3)--K&N TYPHOON INTAKE, FLOWMASTER FORCE II EXHAUST, HYPERTECH MAX ENERGY 93 OCTANE TUNE, HOTCHKIS SUSPENSION, BLACKED OUT BOWTIES, GLOSS BLACK 20x9 STYLE 41 WHEELS, JBA HIGH-FLOW CATS
DAD'S RIDE: 2012 ZL1 #1866--BLACK, 6 SPEED, EXPOSED CF HOOD, POLISHED WHEELS, SUNROOF, ROTO-FAB INTAKE
"Silly Americans, taking from the rich and giving to the poor only works in fairy tales. Success is earned here!".