T124 High Compression Long Block EngineHigh compression No fuel system or ignition systems included Special head machining fits stock length intake manifolds (S&S manifold size 410) Revised oil routing on '99-'06 Touring models make it so an oil line installation kit is no longer required Includes Super Stock™ heads, crankcases, TC3 oil pump, cam plate, and easy start 640 gear drive cams The breather vent bolt location has been adjusted to the stock location, the stock style air cleaner back plates will bolt up to this engine. Made in the U.S.A. Cylinder heads on the T-series long block engine are '99-'05 style. '06 models will require a set of '99-'05 style offset intake flanges. The cylinder heads on this engine is specially machined to compensate for the non-stock cylinder length. That makes it compatible with the manifold and the throttle body with stock length intake runners. T- series engine is not compatible with Softail models.