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S&S CYCLE MK-Series B Crankcase for M8 Softail – Black, Part Number 310-1326
Regular price $2,849.95 USD
Category:
Crankcase - MK-Series "B" - Black - M8 Softail
The S&S CYCLE MK-Series B Crankcase for M8 Softail (Part Number 310-1326) is engineered to provide a solid foundation for high-performance engine builds. Crafted in the USA, this crankcase features a stock deck height and a large volume sump, optimized for accommodating larger bore kits and enhancing engine capacity. Its machined, close-fitting oil scraper replaces the stock cast version, improving oil control and overall reliability. This design allows for increased oil scraping, which is essential for high-performance applications, and ensures a precise fit within the stock Softail frame for seamless installation.
Built with durability and precision, the crankcase is ideal for enthusiasts seeking to upgrade their Harley-Davidson Softail motorcycle with big-bore engines. It is compatible with a S&S 136-inch cylinder kit and a 4 5/8-inch stroker crank (sold separately), offering flexibility for customizing your engine’s performance profile. The inclusion of a Manufacturers Statement of Origin (MSO) guarantees authenticity and supports proper registration. Whether you are building a high-horsepower street machine or a reliable cruiser, this crankcase provides a robust platform for your modifications and ensures long-lasting performance.Designed for easy integration, the S&S CYCLE MK-Series B Crankcase combines quality craftsmanship with functional enhancements to meet the demands of serious riders. Its black finish not only adds a sleek aesthetic but also provides corrosion resistance, maintaining its appearance over time. This component is an essential upgrade for those looking to maximize their Softail's engine potential while maintaining compatibility with stock frame dimensions. Trust in S&S CYCLE's reputation for performance and quality to deliver a crankcase that stands up to the rigors of high-performance motorcycle riding.
Features:
- Stock deck height and large volume sump for increased engine capacity
- Machined, close-fitting oil scraper for improved oil control and reliability
- Compatible with big-bore kits and high-performance engine components
- Made in the USA with precision craftsmanship
- Includes Manufacturers Statement of Origin for authenticity
- Fits into stock Softail frame for straightforward installation
- Black finish offers corrosion resistance and aesthetic appeal





