I can definitely vouch for these headers making over 30hp with a tune. I gained 30 hp from the PPE headers, Motordyne Y pipe and cat, and a Tanabe exhaust without a tune. That was with my CEL still on and immediately after install.
__________________
Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
|