Hooker Maximum Flow Muffler 21602HKR long-bed Notes: Includes GT500KR models

Notes: Includes GT500KR models

Also Fits 01-07 gMC Sierra 2500HD/3500

Exclusive Scavenger Series X-pipe Cross-over

Tail Pipe Outlet Outside Diameter: 4

Hooker Maximum Flow Muffler 21602HKR long-bed Notes: Includes GT500KR modelsOverview 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.