T-304 Stainless Steel Bolt On Installation All Welded Construction Made In USA Classic BORLA Sound Factory Split Rear Exit vehicles ONLY. Add Adapter 60708 for Crew Cab with Standard Bed (6' 7") 157" Wheelbase vehicles. This system features the mellow Touring Sound level. Tips NOT included. Use factory tips. BORLA systems that include tips are also available. BORLA Cat-Back and Axle-Back Exhaust System compatible with s feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, BORLA stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.