PISTON KIT HARLEY 3.898 SET/2, WOSSNER K8595D375-2 DAVIDSON
The Wossner K8595D375-2 piston kit is a forged, high-performance solution for Harley Davidson Twin Cam engines. Featuring a +3.75mm oversize bore (3.898 inch) and a domed piston design, this kit delivers a 10:1 compression ratio for increased engine output and efficiency. Manufactured in Germany, it comes complete with essential installation components for dependable operation. Features include forged high-performance pistons with skirt coating, elliptical design for consistent thermal expansion and even load distribution, optimized combustion chamber heat transfer to cylinder walls, domed pistons with 10:1 compression ratio, and includes rings, clips, and pins. Specifications include a bore size of 3.898 inch (+0.148 inch, +3.75mm), a compression ratio of 10:1, and quantity of 2 pistons per kit. Made in Germany. Cross-reference OEM part numbers include 56-W9866.375.WO and Ring Set Part No. 990XSY.
- SKU
- 56-W9866.375.WO
- Brand
- Wossner
- Availability
- In Stock (1)
FULL DESCRIPTION
Wossner Piston Kit for Harley Davidson Twin Cam Engines
Upgrade your Harley Davidson Twin Cam engine with the high-performance Wossner K8595D375-2 forged piston kit. This kit is engineered for superior performance and durability, featuring a +3.75mm oversize bore (3.898 inches) and a domed piston design that achieves a 10:1 compression ratio. Manufactured in Germany, these pistons are designed to optimize combustion chamber heat transfer and provide consistent thermal expansion for even load distribution.
Key Features:
- Forged high-performance pistons with skirt coating for enhanced durability.
- Elliptical piston design ensures consistent thermal expansion and even load distribution.
- Optimized combustion chamber design for efficient heat transfer to cylinder walls.
- Domed pistons with a 10:1 compression ratio for increased engine output.
- Complete kit includes essential rings, clips, and pins for a straightforward installation.
Specifications:
- Bore Size: 3.898 inches (+0.148 inches, +3.75mm)
- Compression Ratio: 10:1
- Quantity: 2 pistons per kit
- Manufacturing Origin: Germany


