Exhaust Muffler for 5 X 8in. Oval Straight-Through Performance Exhaust Muffler MagnaFlow 12289 flowmaster 3/8" machined flanges for a

3/8" machined flanges for a perfect seal

throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance

1L L6 1968 - 1972 Pontiac LeMans 250/4

4 V8 1961 Pontiac Tempest Safari 389/6

7 V8 1988 - 1991 GMC C2500 350/5

Exhaust Muffler for 5 X 8in. Oval Straight-Through Performance Exhaust Muffler MagnaFlow 12289 flowmaster 3/8" machined flanges for aOverview: 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: Body Finish Satin Exhaust Tip Quantity 0 Overall Length (In.) 30 Outlet Type Offset Outlet Quantity 1 Muffler Type Straight