High quality USA made! Good for: Mini bikes, go karts, generators... multipurpose. This been tested on: Predator Max 459cc, DuroMax XP16HPE 420cc, DuroMax XP18HPE 457cc, Predator 8HP (301cc) OHV, Predator 13 HP (420cc) Engine from harbor freight. Made in U.S.A. Exhaust has a 1" BSP thread on the tip, please understand that 1" does not mean the actual size of the thread, thread is measured by TPI number of threads per inch. There is no paint on this Exhaust, the material is polished mild steel, if you want I can sandblast it at no cost (You have to send me a message at the time of order) you can paint it any color you like, I recommend rust Oleum 2000f, you have to order it separately .