Performance fat Exhaust only! It measures around 15in fat tubing OD 1.25″ for Performance. For Drift Trike or gokarts. You must know this before you make your purchase! -This exhaust will change color due to the high heat generated by the engine. -There is no painting in this exhaust, Rust can come out over time, “solution” you applies high heat paint. Type of material: Mild steel, Uncoated Steel. *Gasket & Engine not included. – 2 Lock washer and 2 nut included. Remember this is not a Muffler, is LOUD! Please check the pictures for measures and details before you buy it, make sure that this exhaust is going to work in your application!