09-24 Challenger, Charger RT, & 300 5.7l Kooks 3100H430 1-7/8 HEMI Header & Green Catted 5.7 Conn Kit

We strongly suggests that you pick up a set of OEM D-Port exhaust gaskets (5038098AA \ 99AA) for use when you install these headers. In addition, custom tuning is highly recommended for your R/T when you add long tube headers in order to adjust fuel settings to keep your engine running safe as well as to keep you from getting a Check Engine Light from swapping out your stock catalytic converters.