Description
S&S 131" Stroker Big Bore Piston & Cylinder Kit for Harley Davidson Milwaukee Eight
S&S has been building big bore kits for Harleys since the 1960s and has it down to an absolute science. Their latest efforts are aimed at the Milwaukee Eight platform (2017 and newer HD big twins) and open up a whole new level of performance for these bikes. Combining the newly design forged piston with the 4.25” cylinders nets a tire melting 131" when paired with the 4.625” Stroker flywheel assembly.
S&S build their big bore kits and cranks to much tighter tolerances and with higher quality materials than the Harley factory parts. This big bore kit is a solid platform for massive power.
Kit includes a forged 4.250" big bore piston kit, 4.250" big bore cylinders, 2 head gaskets, 2 cylinder base gaskets, 4 cylinder dowels and 2 exhaust gaskets.
Features:
- Bolt-on kit, works with the stock crankcases but requires Stroker flywheel
- Huge displacement increase means huge power increase
- 4.250” bore cylinders with a new 11:1 forged piston design
- Original engine serial numbers are retained
- Retains stock engine height
- Includes 131" Cam Cover Badge
- Requires a 4 5/8" Stroker Flywheel Assembly
- Requires S&S extra strong head bolt kit or similar that must be purchased separately
- Instruction manual available here 510-0481 4-25 bore for m8.pdf
Shipping and Delivery Times:
We process all orders from our warehouse in Falkenberg, Sweden, ensuring prompt shipment. All packages are shipped with DHL.
Understanding Stock Information:
- In stock: In stock at Customhoj, it will ship to you within the time listed. For EU countries, delivery typically occurs within 2–5 business days after dispatch.
- Sold Out: Currently out of stock at Customhoj, but we expect to have it back soon! Please feel free to contact us for information on when the product will be available again.
When purchasing products with multiple variants, the stock status will be automatically updated as you select the specific variant you wish to buy.
Our commitment to timely shipping ensure that you receive your order as quickly as possible.
30-Day Return Policy - No Questions Asked:
If you are not entirely satisfied with your order, whether you need to change sizes or have other concerns, we offer a full 30-day return policy from the day you receive your order. Return shipping costs apply.
Please note that the right to return does not apply to products that are personalized, or manufactured upon order. See our return policy for complete details and conditions.
If you have any further questions or require assistance with your order, please don't hesitate to reach out to us!
If you have any questions about this product we are happy to answer them!
Reach out to us by phone, email or on Facebook below:
Phone: +46 (0) 920 224 878
Email: support@customhoj.com