Take your 6.4 L HEMI 392 engine to the show and proudly show off your American muscle with our Perforated Plenum Cover. Whether you're driving a Challenger, Charger, a Chrysler 300 or a Jeep Grand Cherokee, if you've got a 6.4 L 392 engine under your hood this plenum is for you. Handcrafted right here in the USA, this is an easy to install DIY engine accessory. Don't cover your engine with anything else other than American made stainless steel!