Flowmaster introduces our FlowFX Extreme stainless steel cat-back exhaust systems for the 2014-2019 and 2019*- 2021 (*new body) Chevrolet/GMC Silverado/Sierra 1500 trucks with the 4.3 and 5.3-liter engines. These systems use a FlowFX series muffler for an aggressive to moderate sound level and increased performance. 3.00-inch mandrel bent 409 stainless steel tubing allows for maximum exhaust flow and durability. The systems have a turndown style, dump exit right after the muffler to eliminate the over-axle tailpipe. This elimination of the tailpipe helps improve ground clearance and departure angle when you are driving in more extreme off-road situations. Max dyno gains of 15 hp and 20 lb-ft at the rear wheels with the 717977 kit. All of the necessary hardware is included, and factory- mounting locations are used for an easy installation. Backed by Flowmaster's Lifetime Limited Warranty.
Flowfx Series Performance Muffler Offers An Aggressive To Moderate Sound Level And Increased Performance
409 Stainless Steel Construction Delivers Extra Durability And Improved Long-Term Corrosion Resistance
Max Dyno Gains Of 15 Hp And 20 Lb-Ft At The Rear Wheels With The 717977 Kit
Includes All Necessary Hardware For An At Home Installation
Dump Style Exit Allows For Better Ground Clearance When In Extreme Off-Road Conditions
Uses Factory Hanger Locations For Easy Installation
