MagnaFlow Performance Series diesel exhaust systems are the company’s premier diesel kits. Expect big power gains from the turbo-back, cat-back, or downpipe-back—with a dyno-proven straight-through design. They’re made from 400 Series stainless steel, with 300 Series stainless welded double wall tips polished to a mirror finish. The mandrel-bent intermediate and tailpipe tubing is available in various diameters. Performance Series exhausts are tailored for fitment on specific make and model diesel applications, and are covered by a lifetime construction warranty.