2 x FKM O-ring 58 x 2mm

Fit perfectly on my Smolik Avenger head

An American product done right with great service.

Great product and great service. 1. It brought me to .9 squish with no decking 2 creates an excellent seal. 3 my rings wear lost in 4he mail so immediately Ethan shipped out more express. He also responded to technical questions not pertaining the product with no obligation to. I trust smolik perfomace with my money. You should too.

Top Quality O Ring to use in conjunction with the head gasket.!!!!!

If you have a motorized bike you have to check out the Smokik Performance Heads that these guys make for quite a few different 2nstroke bike engines. They are to knot h in quality and performance. The head also comes with 3 Viton o-rings made specifically for the head you order. Simply install the o ring into the groove designed.into the head, place your head gasket on the jug and then slide the head down onto the jug and tighten your nuts. Now you have a complete problem free seal and the compression you gain thanks to the high compression head and your perfect seal you will see a lot more torque along with hella gains in speed. These fellas know what they are doing and everything I've ordered from them is fault free and manufactured with the highest quality that I've experienced in this industry.