2020-2021 Powerstroke 6.7L 4" Downpipe Back Exhaust No Muffler (421031)2020 2021 Powerstroke 6. 7L 4" Downpipe Back Exhaust No Muffler (421031) 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!

5" Valves w/ Seats (07-h-005H) replacement valves over OEM 1

From the CNC-machined intake blocker to the upgraded silicone re-route hose

At just $18

7 Powerstroke (2011-2014)

Available: STD •

flat tappet camshaft engines and tight clearance nitrous engines (under

use in conjunction with a Fluidampr Cummins drill pin kit

All kits come complete with hardened parallel-ground washers and high quality nuts

Reduce the chance of charge pipe boot failure and the possibility of uncontrolled engine revs or engine runaway during competition use

000 horsepower

Rod Bearings have the greatest amount of eccentricity and have high crush for maximum retention

Sold as balanced and matched set upon completion of custom injector waiver