Seller notes

You're buying ONE(1) New Factory Fresh Autolite AR3910X Racing Spark Plug that may fit your performance equipment depending on the situation. The experimental "X" plug is similar in spec. to the regular AR3910 but sports a s specially machined 4-corner firing surface gap style instead of the normal electrode design. Specs. are... 5/8" Hex, 3/4" Reach, 14MM Thread, Nickel Plated Shell, Gasket Seat, Non-Resistor. FREE Shipping to qualifying US 50 states/territories. Others determined by postal zip...

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