BBK Performance 304 Stainless Steel mid X pipes are specifically designed to be used with BBK full length headers to complete the installation to the cat back exhaust system. 2-3/4" CNC mandrel bent Stainless tubing and BBK X section to ensure maximum flow and horsepower. Each BBK 304 Stainless Steel mid X pipe offers performance, quality and value that guarantees years of top performance for your Corvette. Fits all transmissions. Please note: OFF ROAD pipes do not have any catalytic converters and are manufactured and represented ONLY for the purpose of OFF ROAD-RACE USE ONLY. This part is not legal for use in California or any state that has adopted California emissions standards. Please check your state and local emissions laws to ensure compliance.