Made with the highest quality USA - T304 stainless, these direct bolt-in systems are manufactured to provide outstanding performance and a great fit. All systems come with standard with 3/8" thick flanges, merge-style collectors and severe duty metallic substrate cats. For your convenience we've also added all the plug-and-play Oxygen sensor extensions, and O2 bungs for relocating factory O2's. As an added feature, RIPP made sure the stock exhaust heat shields bolt back in place, so you don't run into trouble with under hood plastics like ALL our competitors do. This system is considered the highest quality and most powerful brand in the Wrangler world, we take our performance seriously and so should you. Don't be fooled by short tube header design brand or price. Our header truly delivers on its promise. They are a three piece bolt together design, which provides an easy installation in comparison to the competitions. The Tig welded and hand ported 3/8" thick flanges mate perfectly and make sure the gaskets will not leak. Fully welded 3 into 1 merge collectors assure equal exhaust pulsations. Also included are two - 200 cell ultra high flow metallic substrate cats. In short these are the best hand crafted header for that V6 and will provide on average of 35lbs/ft or torque 600 RPM sooner than stock and 25 rear-wheel HP gains with excellent response throughout the RPM range.