Hooker Maximum Flow Muffler 21605HKR exhaust-manifolds 1967-1974 Pontiac Firebird 400 CID

1967-1974 Pontiac Firebird 400 CID

2017-2020 Ford F-150 213 CID

Part Number: 943040

1986-1991 Chevrolet Camaro 305 CID

Part Number: 15389

Hooker Maximum Flow Muffler 21605HKR exhaust-manifolds 1967-1974 Pontiac Firebird 400 CIDOverview The Hooker Maximum Flow muffler actually flows 99% and produces more horsepower and torque than a 2 1 2" open pipe. The Maximum Flow is constructed of an aluminized steel case with stainless steel internal core and uses a high temperature packing material to absorb excessive noise while allowing a mellow powerful sound. As with all absorption type silencers, the Maximum Flow will be most effective for sound control with lower compression (8.