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
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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
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