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.
