Kook's has produced a top of the line set of headers for the 6.1/6.4 line of Hemi's. This system is our choice for SRT customers who are getting header upgrades performed here at HHP. Kooks headers have repeatedly shown the highest gains on stock and modified 6.1L motors during dyno testing by HHP.
HHP strongly suggests that you pick up a set of OEM D-Port exhaust gaskets (5038098AA\5038099AA) for use when you install these headers. In addition, custom tuning is highly recommended for your SRT 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. HHP has the best email tunes on the market for these headers. Give us a call to discuss what we can do for you.
Disclaimer: For off road or racing use only
Fully matched D-port header flange for a exact port match on the 6.1/6.4 Equal length tube on all primary's 1-7/8" x 2" stepped dia primary tubes options 3" fire cone collectors 304 Stainless Steel Custom 3" mid pipes Off Road Use Cats Made to connect to any aftermarket exhaust using stock mounting All hardware, O2 sensor extensions included.
Standard Cats: These high-performance catalytic converters work great when it comes to giving you better performance from a higher flowing cat while keeping your exhaust gases in check and your car emissions legal in most US states. These Metallic cats do have their limitations and cannot handle the extreme exhaust temperatures seen in highly modified forced induction vehicles.
