MBRP XP Series Exhaust System Focus STMBRP XP Series Exhaust Systems MBRP XP Series exhaust systems are designed to withstand the toughest conditions, on and off the road. Their rugged, thick, 16 gauge stainless steel tubing won't rust through. They feature solid, reinforced welds at vital stress points, making certain that your system stays securely mounted. The MBRP XP Series mufflers and pipes deliver a rich, mellow exhaust note and are finished off with a mirror polished, stainless