From February 1966 to November 1966 Morgan produced the two-seater +4 Competition model, of which only 42 were built. It is estimated that only approximately 11 of these still exist today. The Morgan +4 Competition model was approximately 10% more expensive than the standard +4. The Competition model had a low-line steel body, similar to the Morgan "Super Sports" aluminum body, and generally came with a Derrington four branch exhaust manifold, Derrington competition steering wheel, 72-spoke wire wheels, Armstrong select-a-ride electrically adjustable rear shock absorbers, and the 2.2-litre twin SU carburetor TR4 engine. Ref: "Morgan First and Last of the Real Sports Cars" by Gregory Houston Bowden (1972), and "The Four Wheeled Morgan" Volume 2: The Cowled-Radiator Models by Ken Hill (1980)