KB Performance Piston KB Performance, 1200cc B.T. piston kit. +.040″

Description

KB Performance PistonKB Performance, 1200cc B.T. piston kit. +.040″  944636

fits  41-78 74″/1200cc Knuckle, Pan, Shovel (NU)

Compatible with stock cylinders and heads, gives stock compression ratio. 8.5:1 CR. Piston weight 370gr. Piston pin weight 97gr. Head type: Dome 0.656″ / Dome -57cc. Compression height 1.450″. Bore 3.4375″ / Stroke 3.969″ (3-31/32″). Rod length 7.440″ / Cyl. length 5.330″. Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.

 

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