5" DOWNPIPE BACK SINGLE | 2020-2022 GM 2500/3500 6.6L DURAMAX L5P Style:Muffler thanks to the variable nozzle

thanks to the variable nozzle technology (VNT) which allows the turbo to act smaller upon spool-up and then open up to flow more exhaust on the top end

& UPPER CYLINDERS

Rated at 140 gallons per hour

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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

5" DOWNPIPE BACK SINGLE | 2020-2022 GM 2500/3500 6.6L DURAMAX L5P Style:Muffler thanks to the variable nozzleOur 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