Unleash the sound and performance your GM 2500HD or 3500HD deserves with Flowmaster’s FlowFX Direct-Fit Muffler System! Built from durable 409 stainless steel, this easy bolt-on upgrade delivers an aggressive tone with no drone, plus dyno-proven gains of 7 hp and 5 lb-ft to your 6.6L gas engine truck. Of course, backed by Flowmaster's Lifetime Limited Warranty.Shop Now: https://holley-social.com/FlowmasterGM718155FB#Flowmaster #FlowmasterMufflers #FlowmasterExhaust #GM | Flowmaster

Flowmaster’s® American Thunder Direct-Fit Muffler system for the 2025 RAM 1500 3.0L High Output is an easy, affordable performance upgrade. Built from durable 409 stainless steel, it fits both 2WD and 4WD models and features dual 3-inch inlets flowing into a Super 40-style muffler for aggressive sound and performance. It connects to factory tailpipes and delivers up to 18 hp and 15 lb-ft gains at the rear wheels. Uses stock hangers for simple DIY installation. Includes all hardware, instructions