Flowmaster 70 Series Big Block II Muffler - 3" Center Inlet/Outlet HSXSM11SAS 615 in Head

615 in Head

User configurable display via buttons on the gauge face for changing AFR values

Quickly set steel and aluminum mandrel rivets anywhere without the need of an air compressor

1965-1966 GMC I1500

Does not fit LT1/LT4

Flowmaster 70 Series Big Block II Muffler - 3" Center Inlet/Outlet HSXSM11SAS 615 in HeadThe 70 series utilizes Flowmaster's patented Delta Flow technology and an enlarged case for improved sound control along with mileage and power gains. Perfect for use on trucks, SUV's, RVs, tow vehicles and high performance street cars where space allows. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. Features: Durable Fully Welded 16 Gauge Aluminized Steel 3 Year Limited Warranty Stock to Mild Exterior Exhaust