Muffler is made of 304 Stainless steel USA made. It is made of Thick SS Heavy duty Stainless steel, it won't break like the Chinese junk!

Muffler is made of 304 Stainless steel USA made. It is made of Thick SS Heavy duty Stainless steel 1/16 wall, it won't break! You can screw onto a male nipple. common pipe thread or what they call black pipe thread. Universal uses, especially on minibikes and go karts! Muffler supports engines between 9-20HP, Example of compatible engines: Hond_a GX240, GX270, GX390. Predator 301, 420, 459, 670 (For the 670 you need to order two!) NOTE: Please understand that the 1" thread does not represent actual thread size, threads are measured as TPI number of threads per inch, also understand that it will not eliminate the noise level completely but it will help.

• Please understand that the 1" thread does not represent actual thread size, threads are measured as TPI number of threads per inch.