jim i installed a few s & b"s on the 6.4"s with no check engine lights.
they seem to work fine and install is easy. I installed a BD super scoop CAI on my 6.4 and would not recommend one for a daily driver, the BD kit works great and does everything they claim but anything thats in the air WILL get scooped right into the airfilter,snow/bugs/water. Im going to change mine over to the s & b. just my opinion but instaling a CAI dont give x-amount of hp/tq it just removes a restriction and releases what the engine can produce.
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