5" DOWNPIPE BACK SINGLE | 2020-2022 GM 2500/3500 6.6L DURAMAX L5P Style:Muffler & UPPER CYLINDERS

& UPPER CYLINDERS

This results in reduced friction

FASS Whisper Technology effectively and drastically reduces the sound levels of the Signature Series FASS Diesel Fuel System to a “whisper” while at the same time increasing fuel flow rates

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improve turbo spool

5" DOWNPIPE BACK SINGLE | 2020-2022 GM 2500/3500 6.6L DURAMAX L5P Style:Muffler & UPPER CYLINDERSOur exhaust systems are offered in 16 gauge aluminized steel or T409 Stainless for easy installation and utmost durability. Expected benefits include enhanced performance, decreased EGTs, heightened flow, and improved breathing for your truck. With our FLO~PRO exhaust system, gain horsepower you can hear! * IMPORTANT NOTE: These kits will only fit models equipped with the OEM style 4 bolt flange off the turbo direct pipe! These parts are for use on