AUTOLITE AR13 Racing Spark Plug- Box - 4

Features Product Type - Spark Plug Material - Nickel Plated Shell, Racing Applications Heat Range Chart Location - See Racing Section Hex - 5/8 in. Reach -.460 in. Resistor/Non-Resistor/Suppressor - Non Resistor Seat - Tapered Thread Diameter - 14 mm. Tip - Power Box - 4 Principal Applications - 85-82 BUICK, 88-83 CHEV./GMC TRUCK, 88-79 CHEVROLET, 75-73 DODGE, 86-82 OLDSMOBILE, 75 PLYMOUTH, 88-81 PONTIAC (High Performance/Racing) - SKU: KSAO10264

Replacement racing spark plug used by many professional car drivers Specifically designed with colder heat ranges than the factory plug to handle added power Contains an Yttrium-enhanced alloy to enable up to 8% reduction in sidewire temperature for improved durability and less pre-ignition Features cut back ground electrode for improved ignitability of flame kernel Coated in an anti-corrosive nickel plating to prevent rusting