Engines come with names like Evo, Twin Cam, Shovelhead, Panhead and Knucklehead.

The Twin Cam 96 was released for the 2007 model year.

The Twin Cam wasn't initially used in the Softail model family before the year 2000.

The new base engine was a 2.4-liter four-cylinder "2.4L Twin Cam" that replaced the 2.3-liter Quad 4.

The Evolution engine was replaced by the Twin Cam 88 engine on all large-framed Harley-Davidson motorcycles in 1999.

QED even bought the license to officially re-produce the Twin Cam's cylinder head.

Further changes were made for the 1996 model year when the engine's bore & stroke were changed, and the engine was subsequently redubbed Twin Cam.

The Twin Cam was replaced by the Ecotec for the 2003 model year.

Production of the Twin Cam, which was originally produced at Halewood, was phased out as the RS1600 was developed.

The frame was designed to accept any Harley- Davidson V-twin, including the new Twin Cam 88.