S&S CYCLE T124HC Long-Block Engine 310-0882A

If you're building serious performance into a 2006-17 Dyna platform, a factory long-block simply won't cut it. The S&S T124HC delivers the displacement, airflow, and reliability you need to make real horsepower gains without compromising durability. This is a complete, ready-to-bolt engine that handles hard acceleration and sustained RPM without the guesswork of piecing together individual components.

Every critical system has been engineered specifically for Dyna fitment. The CNC-machined cylinder heads flow air efficiently, the cam timing is optimized for low-end grunt and peak power delivery, and the oil system is redesigned to maintain pressure during aggressive riding—including wheelies. You're not just buying displacement; you're buying proven engineering that works right out of the crate.

• Displacement: 124 cubic inches
• Cylinder heads: S&S B3, CNC-machined
• Exhaust flanges: Two-bolt
• Crankcases: S&S super stock T2
• Breather: Reed valve equipped
• Flywheels: Three-piece design
• Oil pump: High-flow S&S
• Cam system: 635 easy-start gear drive
• Rocker ratio: 1.725:1
• Valve lift: .674" total
• Tappets: Premium high-performance
• Finish: Wrinkle black powder coat
• Oil lines: Stainless steel kit included
• Fitment: 2006-17 Dyna models
• Installation: Bolt-in, no frame mods
• Excludes: Carburetor, intake, ignition
• Made in USA