MBRP 18-20 Jeep Wrangler JL 2.5in Single Rear Exit Cat Back Exhaust - T304MBRP 18 20 Jeep Wrangler JL 2. 5in Single Rear Exit Cat Back Exhaust T304 THE ONLY EXHAUST YOU"LL EVER NEED MBRP Armor Pro Series exhaust systems are backed by a Lifetime Warranty and crafted out of T304 Stainless Steel the most durable material grade that money can buy. The T304 Stainless Steel tubing is easy to clean and maintain. Ita**s the obvious choice for you if you operate your vehicle in extreme conditions. All of the tubing is mandrel bent