S&S T124 Long Block Engine With Easy Start Camshafts For Harley Features: No fuel or ignition systems included, upgrade to your choice of performance intake, throttle body, and ignition Special machined heads to fit stock length manifolds (S&S manifold size 405) Super Stock T2 crankcase, stock looking, but stronger. thicker wall made 356-t6 aircraft grade aluminum Three Piece Flywheel assemblies with the main shaft integrated into the flywheel forging, continuing to keep the stock diameter crankpin. Stronger design due to superior materials, updated production techniques, and patent pending designs. S&S high flow oil pump and cam cover Stock 96 Twin Cam bolt pattern Forged flat top pistons 4-1/8 Bore 4-5/8 Stroke Requires oil line installation kit 434-336 for 1999-2005 FLT models, 434-335 for 1999-05 Dyna Models 58mm throttle body is highly recommended Carbureted engines will require a performance ignition module that allows adjustments to the advance curves 2 Year warranty period S&S engine are shipped without oil Not legal for sale or use in California on any pollution controlled motor vehicles.