MBRP's XP Series gas performance exhaust systems have proven their ability to stand up to the toughest conditions, on and off the road. The rugged nature of an XP Series performance exhaust is no accident. Thick sixteen gauge T409 stainless steel tubing will not rust through. Solid, reinforced welds at vital stress points make certain that your system stays secure. After millions of miles logged by tens of thousands of MBRP customers MBRP backs this system with a lifetime warranty.