T124LC Long Block Engine for 1999-2006 (except 2006 Dyna®) with 585 Cam - Wrinkle BlackThe 124 cubic inch T124 low compression Long Block engine fits 1999 '06 HD big twins except 2006 Dyna models. Long Block engines do not include a fuel or ignition system, so they can be used for either carbureted or EFI applications. If you already have a performance ignition, larger carburetor or a larger throttle body and EFI tuner, they can be used with this engine. The cylinder heads are specially machined to compensate for the longer cylinders so