S&S, 3-1/2" bore 8:1CR piston kit. Std - 79-84 1340cc/80" Shovel (NU) 560050 OEM replacement reference 68510-74C and

OEM replacement reference 68510-74C and 68643-83B

Reduces total valve train mass

566109 bearing retainer plate)

95-42 and 95-42A

S&S, 3-1/2" bore 8:1CR piston kit. Std - 79-84 1340cc/80" Shovel (NU) 560050 OEM replacement reference 68510-74C andStandard 8: 1 compression ratio. Used as stock replacement for 1340 (80") Shovelhead models, 3 1 2" bore with stock 4 1 4" stroke. These S&S forged pistons come in an advanced alloy and skirt profiles, resulting in a quiet engine and long life, previously only achievable with cast pistons. This is an excellent choice to overhaul your stock 1340cc Shovel. Note: S&S piston fit recommendations: Close fit . 0030" to . 0035", loose fit . 004" to . 005".