Hey guys I'm wondering why I'm losing power top end. Car builds good power til 6950-7000 rpm and then it plateaus til about 7500 then I lose 5hp til redline. Current mods.
Stillen g3
Motordyne manifold
Fi lth
Custom 2.5 exhaust h pipe with magnaflow muffler
4.08s
Uprev tune
Tuner says could be exhaust but I have no idea why it's happening. Any help will be appreciated.
