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 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... I can do sandblast if you want, at no additional cost, this is great for high heat paint to stick well... just live a note when you place the order, or send me a message in time! - 2 Lock washer and 2 nut included. - Heavy duty pipe. - Heavy duty 1/4 Exhaust Flange. - Gasket Mini Bike, not included This been tested on Coleman Powersports CT200U-EX , Coleman CT200U, Coleman BT200X mini bike. Will not work on any other minibike Exhaust pipe Made in U.S.A.