Flowmaster FlowFX Muffler 3" In Offset/Out Center 1012-17 GMC: Sierra 3500 01 -

GMC: Sierra 3500 01 - 06 6 L Engine

Leak Free Ball and Socket Seal

Pontiac: Catalina 78 - 81

polyurethane maintains its original molded shape

13/16-12 in Center Thread

Flowmaster FlowFX Muffler 3" In Offset/Out Center 1012-17 GMC: Sierra 3500 01 -The FlowFX series muffler delivers a moderate performance sound level for the enthusiast looking for an exhaust tone that is different from the "chambered" muffler sound that Flowmaster is famous for. These straight through style mufflers feature a 409S stainless steel case and the quality you would expect from Flowmaster. Vehicle Applications: 1987 1991 GMC R1500 Suburban 1987 1991 Chevrolet Blazer 1999 1999 Ford F 250 1999 2004 Ford F 250 Super Duty