Exhaust Muffler for 5 X 8in. Oval Straight-Through Performance Exhaust Muffler MagnaFlow 12138 rocker-arms-and-parts Max increases of up to

Max increases of up to 18 hp and 18 lb-ft over the stock exhaust at the rear wheels

4 V8 2004 - 2008 Ford F-150 XLT 330/5

7 V8 1996 Chevrolet Caprice 350/5

7 V8 1988 - 1996 Chevrolet G30 454/7

Exhaust Muffler for 5 X 8in. Oval Straight-Through Performance Exhaust Muffler MagnaFlow 12138 rocker-arms-and-parts Max increases of up toOverview: Fully reversible and featuring a free flowing, straight through perforated stainless steel core, stainless mesh wraps our acoustic fiber fill to deliver a smooth, deep tone for your custom exhaust project. Interchange: Brand Interchange Part Number Application: Year Make Model Submodel Engine Size Universal Specs: Muffler Type Straight Through Inlet Type Center Series Straight Through Inlet Quantity 1 Body Width (In.) 8 Body Material