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.
- Category: Pistons and rings kits
- Manufacturer part number: KB409C040
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