KB Performance Piston KB Performance, 96″ to 103″ big bore piston set. +.010″

Description

KB Performance PistonKB Performance, 96″ to 103″ big bore piston set. +.010″  944758

fits  07-17 Twin Cam (NU)

For 96″ to 103″ (3 3/4″ to 3 7/8″) big bore conversions. Used with stock heads and cylinders. By boring the stock cylinders from 3-3/4″ to 3-7/8″ big bore size engine capacity will increase from 96″ to 103″. 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. 10.0:1 CR with 85cc head. Head type: Flat top. +1.9cc / Compression height 1.076″. Bore 3.875″ / Stroke 4.375″. Rod length 7.667″. Note: Top compression ring will need additional clearance. See instructions.

 

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