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2014-2018 GMC Sierra 1500 325 CID
Tip Inlet Diameter: 2
2004-2006 Chevrolet Silverado 1500 294 CID
Increases of up to 9 hp and 11 lb/ft of torque
Big Block Chevy Only
Flowmonster Round Performance Muffler 2.5 Inlet/ 2.5 Outlet 14416-FM Polished St air-intake 2014-2018 GMC Sierra 1500 325Overview 409 Stainless Steel performance mufflers! Hidden beneath your ride lies a powerful creature destined to dominate. FlowMonster chambered and straight through style mufflers create an aggressive exhaust note giving a powerful voice to your car truck SUV. FlowMonster mufflers are constructed of 16 gauge aluminized steel and 409 stainless steel and are 100% MIG welded for maximum strength and durability. The chambered design cancels out unwanted
