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S&S Cycle Head Bolts - Milwaukee-Eight Harley-Davidson
About S&S Cycle
S&S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S&S. Few names carry more weight with engine builders in this space.
Upgrade your Milwaukee-Eight engine with S&S Cycle head bolts, designed for enhanced strength and reliability. These bolts are a direct replacement for stock hardware, offering increased durability for performance builds.
Why riders pick this
- Engineered from heat-treated 8640 steel
- Stronger than stock Harley head bolts
- Black oxide coating resists corrosion
- Features a 12-point head with integral washer
- Designed for reusability during engine service
When pushing your Milwaukee-Eight engine hard, every component matters. These S&S Cycle head bolts are engineered to handle the increased demands of high-performance V-twin applications, providing a critical upgrade over factory hardware. Made from heat-treated 8640 steel, they offer superior tensile strength, ensuring your top end stays secure under extreme conditions.
Engineered for Performance and Durability
- Constructed from heat-treated 8640 steel for maximum strength
- Designed to be stronger than OEM head bolts for demanding applications
- Features a 12-point head with an integral washer for precise torque application
- Black oxide coating provides enhanced corrosion resistance and a clean look
- Reusable design for convenience during engine servicing
Built for the Road Ahead
Whether you're doing a cam swap or building a full-blown performance engine, reliable hardware is key. These S&S Cycle head bolts are a smart investment for any Milwaukee-Eight owner looking to improve the long-term durability of their motor. Their robust construction and thoughtful design make them suitable for both street and track use, ensuring peace of mind when you twist the throttle.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 900-1006
- Material: Heat-treated 8640 steel
- Tensile Strength: 200,000 psi
- Head Size: 9/16 in. 12-point
- Weight: 2.3 lb
- Category: Fabrication / Bolts
Common questions
What makes these bolts stronger than stock?
These S&S Cycle head bolts are manufactured from heat-treated 8640 steel, which provides a significant increase in ultimate tensile strength compared to OEM bolts, making them more resilient under stress.
Do these head bolts come with washers?
Yes, these S&S Cycle head bolts feature an integral washer as part of their 12-point design, ensuring proper load distribution during installation.
Are these bolts reusable?
Yes, these head bolts are designed to be reusable, which can be a convenience during future engine maintenance or performance upgrades.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | S&S Cycle |
| TYPE | Bolts |
| SKU | T14-662066 |
| WEIGHT | 2.3 lb |
So much better than stock.
Looks great but haven’t fitted them yet