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KB Performance, 88" to 95" big bore piston set. +.020"

Supplier SKU: 944744
Sale price£324.88

Availability: Out of stock
Estimated supplier restock: 10 November 2026 Supplier estimate, subject to change. Delivery time is additional once stock arrives.

The details that matter

Details

Description

88" to 95" big bore conversion.
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 88" to 95".
High compression (pop-up).
10.5:1 CR.
Piston weight 437gr.
Piston pin weight 97gr. / Head type: Dome.
Dome -11.2cc / Compression height 1.270".
Bore 3.875" / Stroke 4.000".
Rod length 7.667" / Cylinder length 4.938".
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.

Specifications

Unit SET

Fitment

99-06 Twin Cam A/B (NU)

Part numbers

Supplier SKU 944744
Manufacturer part KB411020

Specifications

BrandKB Performance Piston
CategoryPistons and rings kits

Fitment

Part numbers

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