Attention! Exhaust only works on these engines, Predator 79cc from Harbor Freight, Coleman ct100u or Coleman cc100x Mini bike only. Please, Dont order it if you have something different! I recommend that you wrap it with an exhaust wrap, this will look good and will prevent the leg from coming into contact with the hot exhaust. (you have to order it separately) Note:This header does not have any kind of paint. Type of material: mild steel, Uncoated Steel. -Gasket & Engine not included. 2 Lock washer and 2 nut included. Good for: Mini bikes, go karts... multipurpose. This is custom made Header Remember this is not a Muffler, is LOUD! (see photos for details)