I have a friend who owns a 1998 GTP he claims that he engine is 400hp. He has these mods and I wanted to know how much hp he is really running. Can some tell me if its anywhere around 400.
Custom DHP tune
3" ZZP Modular pulley
ZZP Cam, 105 springs and lifters
Custom ported heads
Bronze guides
Stainless valves
SLP headers
50 lb injectors
Walpro 255 fuel pump
160° T-stat
Thrasher shift kit
Pro Tork 3200 stall converter