Check the listing for details. Slip-On 1.25" ID Exhauts Muffler 304 Stainless Spark arrestor Inside, SS Clamp.. Color: Silver, Condition: New. Listed at 54.50 USD. 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! You can use this Muffler on any aftermarket 1.25" OD tubing header pipe... It has spark arrestor inside. common exhaust pipe on predators 301, 420, 459, 670. or GX240, 270, 390 Generators or small tractors, any aftermarket exhaust that has a 1.25" OD tube. I offer a wide variety of these exhausts, please check my store for more details. Universal uses, especially on minibikes & go karts, ! Muffler supports engines between 9-20HPMuffler 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! You can use this Muffler on any aftermarket 1.25" OD tubing header pipe... It has spark arrestor inside. common exhaust pipe on predators 301, 420, 459, 670. or GX240, 270, 390 Generators or small tractors, any aftermarket exhaust that has a 1.25" OD tube. I offer a wide variety of these exhausts, please check my store for more details. Universal uses, especially on minibikes & go karts, ! Muffler supports engines between 9-20HP