Magnaflow Performance Exhaust Muffler 12249: 3"/3" Inlet/Outlet, 5X8X18" Oval, Stainless Steel, Satin Finish. Manufacturer Part Number 12249. Specifications | MagnaFlow Part # 12249. DYNO-PROVEN PERFORMANCE - Extensive dyno testing is used to ensure that this 5" x 8" Oval muffler increases engine power and performance by improving the flow dynamics and evacuation of exhaust gases.
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