310-1341 S&S M8 Touring MK-Series crankcase assembly. Large bore for Harley-Davidson
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Specifications
- Brand
- S&S
- Part Number
- 310-1341
- OEM Reference
- —
- Pack Quantity
- Each
- Category
- Crankcases
- VAT Rate
- 20%
About This Product
S&S MK-Series large bore crankcase assembly for 2017 to 2025 Harley-Davidson Touring models. The bore measures 4-1/2 inch with a 4.695 inch spigot bore. It takes the biggest cylinders on the market. The cases carry a machined oil scraper to reduce windage and a large sump for better oil management. Stock deck height is retained. They drop into the original frame. They also fit newer VVT models. These are the foundation for a big-power bagger build.
Manufacturer part number: 310-1341.
Fitment
29 models17-26 M8 FLT/Touring
CVO/Custom 4 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2025–2026 | CVO Road Glide ST FLTRXSTSE |
| Harley-Davidson | 2025–2026 | CVO Street Glide FLHXSE |
| Harley-Davidson | 2026 | CVO Street Glide Limited FLHXLSE |
| Harley-Davidson | 2026 | CVO Street Glide ST FLHXSTSE |
Police 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2024 | Police Road Glide FLTRXP |
Touring 24 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2023 | Electra Glide Highway King FLHFB |
| Harley-Davidson | 2025–2026 | Road Glide FLTRX |
| Harley-Davidson | 2023 | Road Glide Anniversary FLTRXSANV |
| Harley-Davidson | 2017–2023 | Road Glide FLTRX |
| Harley-Davidson | 2026 | Road Glide Limited FLTRXL |
| Harley-Davidson | 2021–2024 | Road Glide Limited FLTRK |
| Harley-Davidson | 2017–2023 | Road Glide Special FLTRXS |
| Harley-Davidson | 2022 | Road Glide Special St FLTRXST |
| Harley-Davidson | 2023 | Road Glide St FLTRXST |
| Harley-Davidson | 2025 | Road King Special FLHRXS |
| Harley-Davidson | 2017–2024 | Road King Special FLHRXS |
| Harley-Davidson | 2025–2026 | Street Glide FLHX |
| Harley-Davidson | 2018 | Street Glide Anniversary FLHX |
| Harley-Davidson | 2023 | Street Glide Anniversary FLHXSANV |
| Harley-Davidson | 2017–2023 | Street Glide FLHX |
| Harley-Davidson | 2026 | Street Glide Limited FLHXL |
| Harley-Davidson | 2023 | Street Glide ST FLHXST |
| Harley-Davidson | 2022 | Street Glide Special ST FLHXST |
| Harley-Davidson | 2025 | Street Glide ULTRA FLHXU |
| Harley-Davidson | 2018 | Ultra Limited Anniversary FLHTK |
| Harley-Davidson | 2023 | Ultra Limited Anniversary FLHTKANV |
| Harley-Davidson | 2017–2024 | Ultra Limited FLHTK |
| Harley-Davidson | 2018–2023 | Ultra Limited Shrine Edition FLHTK |
| Harley-Davidson | 2017 | Ultra Limited Shrine FLHTK |
Planning other changes? Find your model in the bike customiser.
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