S&S T124 Long Block Twin Cam Engine

S&S T124 Long Block Twin Cam Engine

Engines are sold as 'Long Blocks', meaning these are engines without any intake components or ignition. Any high performance intake system, that will fit a stock engine, will fit the S&S 124" since S&S specially machined the heads to compensate for cylinder length. Stock compatible air cleaners and breathers will fit.

Engines are available in High Compression (10.8:1 CR flat top forged pistons, with 640GP easy-start cams) and Low Compression (10.2:1 CR dished forged pistons, with 585GP easy-start cams). Low compression is less sustainable to knocking and will give longer engine life. If you prefer all out high RPM horsepower numbers, the high compression engine is the one.

S&S T124 Owners Manual available here

Note: Sold as 'Long Block' engine. Carburetor / throttle housing, manifold, ignition and charging system is not included.

Note: A large throttle housing and high performance ECU is required for best performance. Carbureted engines will require a ignition system with adjustable advance curves and large carburetor, as the S&S Super G or similar.

Note: Charging system requires an early style sprocket shaft spacer, available as S&S A077-493482, with dimensions of 1.750" OD x 1.255" ID x 1.095" thick.

Note oil lines:

• 99-05 Dyna requires a oil line installation kit, which is no longer available. Custom fabrication is required.
• 99-06 Touring requires A299-804704 oil line installation kit.
• 07-16 Touring requires A541-438946 oil line installation kit.
• 06-17 Dyna requires A666-461071 oil line installation kit.