My buddy has headers and the cutout...it sounds quite nasty I might say. I ran him the other night...needless to say...it was brutal. Just an FYI for BGG, Cableguy, and whoever else praises the GXP for not running slow, etc...this GXP was dyno tuned, headers, CAI, shift kit, poly mounts, cutout...I put about 2-3 cars on him from a 60-100...and he got the jump because of "TAPSHIFT" oooooooooooo.
Anyways, sorry, got sidetracked. Does it make sense though, you can get headers for less than the price of what you were gonna spend on that project car...just sayin...