Flowmaster Super 40 Delta Flow Muffler - 2.5" Center Inlet / Offset Outlet 121023 3200 rpm governor spring extends

3200 rpm governor spring extends engine rev range by 700 rpm

1965-1974 Chevrolet K20 Pickup

ultra-lightweight

1993-1995 Ford F-150 Lightning Standard Cab Pickup

Re-Designed for maximum downforce

Flowmaster Super 40 Delta Flow Muffler - 2.5" Center Inlet / Offset Outlet 121023 3200 rpm governor spring extendsThe Super 40 features Flowmaster's Delta Flow technology. It's larger case profile provides the best of both worlds of performance and sound. The Super 40 has that deep powerful sound of the Original 40 series but with all the benefits of performance and low interior resonance from the Delta Flow technology. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. Features: Durable Fully Welded 16 Gauge Aluminized Steel 3