Factory Single Side Exit vehicles ONLY. Add Adapter 60708 for Crew Cab with Standard Bed (6' 7) 157 Wheelbase vehicles. The 140793BC Cat - Back(tm) system by BORLA(r) is a side exit system featuring the mellow Touring sound level and a 4 black chrome on T - 304 stainless steel tip. A bright chrome on T - 304 stainless steel tip is also available. Using BORLA(r) Stainless Steel Polish p 21461 is NOT recommended with these black chrome tips. We suggest cleaning the tips with hot water and a microfiber cloth. Add Adapter 60706 For Crew Cab with Standard Bed (6' 7) 157 Wheelbase vehicles. BORLA(r) Cat - Back(tm) and Axle - Back exhaust systems 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(r) Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium, high - quality T - 304 austenitic stainless steel, superior to T - 400 to give you the absolute best in performance and durability. Ultra - smooth mandrel bends ensure maximum flow power, and precision CNC manufacturing ensures an accurate fit. You can count on BORLA(r) to provide durability, performance, sound, and a Million - Mile Warranty. See separate note about warranty on tip finish.