Description
Factory F-150 downpipes are very restrictive because Ford reduces the diameter of their primary cats from 5.5″ to 5″. This reduction in diameter ( -5 square inches of surface area) causes much higher back pressure and EGTs. With SPD Alpha ultra high flow cats and larger 3″ diameter mandrel bent tubing, you will improve throttle response, mileage and overall performance while reducing turbo lag and exhaust temperatures.
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