Just for an FYI on the GT guys...it took a GT2 Cam, #105's, Custom Dyno Tuning, GTP TB, GTP Injectors, HV3, 4" HAI, Shift Kit, 180*, Poly's, 3" DP, 3" Single Outlet Exhaust (its an SE), and AL606's to keep pace with a Stock GTP with a fenderwell and a 180*. So...I'd rather top swap it with EBay headers...and make about 30-50 more horse with a good tune.