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1987-2020 Cummins 5
7L 4" Downpipe Back Single w/ Muffler (411018 / 412018)
AB T5V 1A9
Our stepped main oil gallery (9/16“ to 1/2“ to 7/16“) increases the flow of oil to the crank at high RPM
and works especially well for those who have added items such as PPE’s Manifolds and Up-Pipes
2019-2024 Cummins 6.7L 4" Flex Pipe Back Single w/ Muffler (411028 / 412028) 2024 1987-2020 Cummins 52019 2024 Cummins 6. 7L 4" Flex Pipe Back Single w Muffler (411028 412028) 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 Flo~Pro system. For powerhouse performance, Flo~Pro delivers horsepower you can hear!