U-Groove Electrode Spark Plugs Accel Pack of 2 (MFG# 2410A) Fits 1200cc & 1340cc Shovelhead 1977-81 & 1340cc Big Twin Evolution1984-Later HD # 5R6A MFG# 496 HD# 32311-83 .040

Weight: 0.33 The best plug money can buy. Manufactured for your motorcycle exclusively by the most innovative spark plug manufacturer in the world and warranted by Accel. Blister packs of 2 are packaged. Boxes of 10 are individually packaged in protective boxes and the boxes of 24 are not individually packaged. Features of Spark Plugs: U-Groove Ground Electrode: Unique U-Groove develops a larger spark for more complete combustion Insulator and Five-Rib Construction: Insulator made of highly purified alumina powder superior in strength and thermal conductivity Copper Glass Seal: Glass and copper bond the center electrode to the insulator to ensure a gas-tight seal Electric Heat Seal: Ensures a stable heat range Copper Core Center Electrode: Copper Core Center Electrode: Copper surrounded by nickel-chrome for superior conductivity Machine Rolled Threads: For trouble-free spark plug installation and removal Accel Blister Pack of 2 (MFG# 2410A) Fits 1200cc & 1340cc Shovelhead all models with Electronic Ignition Hot Plug Late 1977-1981 & 1340cc Big Twin Evolution Ignition Hot Plug 1984-Later Replaces HD Code # 5R6A MFG# 496 (Each) Replaces HD# 32311-83 .040" Gap By: HOLLEY PERFORMANCE PRODUCTS,INC.