You must know this before you make your purchase! -There is no painting in this exhaust, Rust can come out over time, "solution" you applies high heat paint. -This Exhaust Header is loud than the factory. -This Exhaust will change color due to the high heat generated by the engine. Type of material: mild steel, Uncoated Steel. - 2 Lock washer and 2 nut included. Mini Bike, Gasket & Engine not included This been tested on: Coleman Powersports 98cc/3.0HP Coleman CT100U Gas Powered Mini Trail Bike. It will only work on this model CT100U with its original engine! Exhaust Made in U.S.A.