S&S Cycle 310-0511B High Compression Long Block Engine Wrinkle Black - T124

The S&S Cycle 310-0511B is a 124 cubic inch T124 High Compression Long Block engine finished in wrinkle black powder coat, engineered as a performance replacement for Twin Cam-based Harley-Davidson Touring models. This engine delivers a substantial bump in displacement and power while fitting within the stock chassis without modifications.

The long block configuration does not include a fuel or ignition system, allowing riders to reuse an existing aftermarket throttle body, EFI tuner, or performance carburetor. Cylinder heads are specially machined to compensate for the non-stock cylinder length, ensuring compatibility with stock-length intake manifolds and throttle bodies. Breather vent bolt locations are positioned in the stock location, making it compatible with stock-style air cleaner back plates.

Key Features:

• 124 cu. in. (2,032cc) displacement for significantly increased power output
• 4-5/8" stroke x 4-1/8" bore at 10.8:1 high compression ratio
• S&S gear-drive 640 Easy Start cams for strong performance and easy starting
• S&S TC3 cam plate and high-flow oil pump for reliable lubrication
• Super Stock cylinder heads with CNC machining for optimum flow
• Special head machining fits stock-length intake manifolds (S&S manifold size 410)
• Stock-style breathing system compatible with stock and most performance air cleaners
• Wrinkle black powder coat finish matches OEM engine aesthetics
• No fuel system or ignition system included — use existing or aftermarket components
• Oil line installation kit required (sold separately)
• 2-year warranty backed by S&S Cycle
• Made in the U.S.A.

Important Notes: Stock non-programmable engine management systems are not recommended for use with this engine, as they are not calibrated for this displacement. T-Series engines are not compatible with Softail models and are not recommended for Tri-Glide or other three-wheel conversions.

The S&S Cycle T124 long block is a proven, USA-made performance upgrade backed by decades of V-twin engineering expertise, offering a reliable path to big-inch power with a factory-clean appearance.