Product Description
S&S 114" to 132" 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. This kit converts the 114" engine to 132" which is the largest possible 4.320" bore bolt-in big bore kit on the market.
This big bore kit works with stock crankcases, case boring is not required, stock flywheels, stock heads and retains stock engine height.
Includes a forged 4.320" big bore piston kit, 4.320" big bore cylinders, 2 MLS (Multi-Layer-Steel) .030" head gaskets, 2 cylinder base gaskets, 4 cylinder dowels and an S&S cubic inch cam cover batch.
Features:
- Bolt-on kit, works with the stock crankcases
- Huge displacement increase means huge power increase
- 4.320" bore and 4.5" stroke, 11:1 forged pistons
- Retains stock engine height
- Includes 132" Cam Cover Badge
- Requires S&S extra strong head bolt kit or similar that must be purchased separately
- Instruction manual available here 510-0844 4-320” Bore Cylinder and Piston Kits M8 Models .pdf
Variant: 17-23 Touring with 114" engine - Wrinkle Black / Highlighted Fins
SKU: A962-877367
MPN: 910-0845
DPN: 974962
Variant: 17-23 Touring with 114" engine - Wrinkle Black / Non-Highlighted Fins
SKU: A963-877368
MPN: 910-0846
DPN: 974963
Variant: 18-23 Softail with 114" engine - Wrinkle Black / Highlighted Fins
SKU: A962-877367
MPN: 910-0845
DPN: 974962
Variant: 18-23 Softail with 114" engine - Wrinkle Black / Non-Highlighted Fins
SKU: A963-877368
MPN: 910-0846
DPN: 974963
Shipping and Delivery Times
All orders are shipped from our warehouse in Falkenberg, Sweden. We work hard to get them moving quickly!
Stock status explained:
- In stock: Ready to ship to you within the time listed. Packages usually arrive 2–4 business days after dispatch depending on your location.
- 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.
If a product has multiple variants (like sizes or colors), the stock status updates automatically as you select your option.
Our goal is simple, to get your order to you as fast as possible!
30-Day Hassle-Free Returns - No Questions Asked
If you are not entirely satisfied with your order, whether you need to change sizes or something else, 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.
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