ACCEL U-GROOVE SPARK PLUGS (Select Engine) 

Accel spark plugs feature the U-Groove ground electrode allowing the spark to build a Ball-of-Fire flame, providing you with a smoother idle and more complete combustion. Other features are: Five-rib "alumina" powder insulator to prevent flashover and misfire, copper glass inner seal and electric heat seal to prevent combustion leakage, fused copper/nickel centre electrodes providing super conductivity and a wide heat range.

Sold in pairs.

TYPE 1: U-GROOVE; HD 6R12; 12mm threaded Fits: > 99-17(NU)TCA/B; 86-20 XL (excl. XR1200)

• 883 Sportster's 1986 up
• 1100 Sportster 1986-1987
• 1200 Sportster 1988 up
• 1450 Twin Cam 1999-2006
• 1550 Twin Cam 2007- 2017

TYPE 2: HD5R6A; 14mm threaded, long reach Fits: > L78-E82 FL; L78-79 FX; 84-99 B.T.(EXCL. TC)

• 1200 Shovelhead late 1978-1980
• 1340 Shovelhead  1980-1981
• 1340 Evolution 1984 up