Flowmaster 40 Series Delta Flow Muffler 3" Center Inlet 2.5" Dual Outlet DK1324531SFI Reduced wind age around the FIV20002 41551 OR Reduced wind age around the crank and turbulence in the sump means horsepower savings and improved oil control for your engine Factory length for '72 '78 Ford 429 460 1980 1987 GMC Jimmy Universal Muffler Some adaptation may be required
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