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4L Aluminized 5" Downpipe Back Exhaust w/ Muffler (521001)
Requires modified fuel system
120″ radius cutter
All warranty claims must include the failed parts and an oil sample
a PPE Down Pipe and/or PPE OEM Up-Pipes
2019-2024 Cummins 6.7L 4" Flex Pipe Back Single No Muffler (411029 / 412029) 2018 4L Aluminized 5" Downpipe Back2019 2024 Cummins 6. 7L 4" Flex Pipe Back Single No Muffler (411029 412029) 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!
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