Just to add the above comments about leaving the stock mani's and cats on Kelly? You made 405 WHP on a mustang correct with you headers and HFC's correct? I made 412 WHP( 7 SPD AUTO) with stock cats and madifolds. Mustang dyno also. I know every dyno is differnt and numbers will be also, But just to compare I if there where true gains from HFC's and headers I would have expected to see 460sih numbers not close to mine,. BTW car looks the SH#T,, Love everything you did,
Just cause we are talking WHP doesnt mean I can like your ride
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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,