This Wheelbase NOT Available In North America. This system features a 4" Black Chrome on T-304 stainless steel tip. 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. BORLA(r) Cat-Back(tm) & Axle-Back exhaust systems feature straight-through and patented multi-core technology 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 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 (CNC) manufacturing ensures an accurate fit. Best of all, it's comes with BORLA(r)'S Million-Mile Warranty. See separate note for warranty on tip finish.