2011-2019 Powerstroke 6.7L 4" Downpipe Back Dual Exhaust (421005 / 422005)2011 2019 Powerstroke 6. 7L 4" Downpipe Back Dual Exhaust (421005 422005) Constructed out of 16 gauge aluminized steel or T409 Stainless, this exhaust system is designed to simplify installation with included clamps, preweld contour bends and improved flanges. Enjoy a noticeable boost in performance, lowered EGTs and amplified air flow with this Mel's system. For powerhouse performance, Mel's delivers horsepower you can hear!

The bypass valve is 10 psi stiffer than the OEM bypass valve and reduces the chance of dirty oil bypassing

2001-2019 Duramax PPE Oil Filter Socket For PPE Filters (114000559)

2001-2024 Duramax PPE Stage 3 Tie Rod Inner & Outer Boot Replacement Kit (158031522)

allowing for a more straightforward engine setup

and most importantly will move for air into your engine

PPE High-Performance Up-Pipe Gaskets are made to handle extreme changes in temperature

Keep your RAM rear differential running cool and clean with an upgraded cover from PPE

Must choose sizing for bearings and pistons

If you're wondering whether or not you should buy an actuator to compliment your Stealth turbo

Recommended Injectors: Stock

the Original KC38r “Tiger Turbo” is back and better than ever

Make sure that the cam has a Liberal amount of quality assembly lube applied