I wonder if GM intended to make the LS4 cars exhaust sound so sweet? I like both the stock and aftermarket exhausts on any LS4 car,theres a guy with a custom Intimidator Monte Carlo SS its an 06,07 model with headers & exhaust,that car sounds so sweet,i was going to buy a GXP,but im going to keep my Comp G,mod it to no end & buy a 06-07 Monte Carlo SS,which is the best aftermarket headers and exhaust for an LS4 car?

 

Doug Thorley is the only company that makes headers , you can get in on the group buy if your serious about buying the car.

Exhaust is personal Taste mostly , any flow through exhaust is gonne help the top end.