FLO-717931 Flowmaster Flow FX Cat-Back Exhaust System
Maximum increases on the dyno revealed +21 hp and +23 lb-ft at the rear wheels. Fits 2011-2019 GM Silverado/Sierra 2500/3500 HD 6.0L V8 Crew Cab/6.5' Bed, Flow FX 3.5" Cat-Back, Single Side Exit, Stainless Steel Exhaust System.