AR3910X Racing Spark Plug
AR3910X Racing Spark Plug designed just for racing engines and are recommended for the Box Stock Project engines and most all other kart racing motors that run on both gasoline and methanol.
- Unique, special designed shell with "X-gap" groove to run cooler and allow for improved flame kernel development
- These plugs have 3/4-inch reach gasket seat with 14mm threads
- Copper-glass, non-resistive seal bonds insulator, terminal post, and center electrode together ensures full required voltage at spark gap
- Coated in an anti-corrosive nickel plating to prevent rusting
Fits 196cc and 212cc clone motors!