How to Build a 500 WHP 6.4 HEMI! (392 HEMI Mods)

[@JoaquinPowell392]

I have emissions testing here in California so im limited to shorty headers will i pick up some power with a tune?

[@8020Media]

J - Without a tune, about 10whp. But with a tune, depending on how aggressive, 15whp.

[@alexdelgado7921]

Tunes add a lot more hp then 10-15

[@8020Media]

T - What?

[@coltoncaskey5781]

Wrong