Based on a conventional monocoque with wishbone suspension all round the M1 was instantly recognisable with its unusual combination of straight lines and curves. Initially Ford twin-cam engines were used, mostly from Neil Brown, Holbay or Nova but eventually most became Toyota Novamotor powered. Danny Sullivan took the first Modus F3 win at Thruxton and Tony Brise took a very good second place at Monaco.
The major change for 1975 was the introduction of a narrow track suspension and a smoother body work. The car soon gained a reputation for good handling on all types of tracks and conditions except in the damp when it became very nervous to drive. Eddie Cheever took 4 wins in his car, 2 at Silverstone and 2 at Hockenheim and Danny Sullivan had 3 victories at Silverstone, Cadwell and Oulton, whilst Freddy Kottulinsky won at the Nurburgring in his BMW powered version.
Initially there were no real changes to the M1 for 1976 but following problems in comparison with other cars the lower rear suspension was converted from wishbone to twin parallel links at the end of July which helped but by then it was too late and at the end of the season Modus closed down. The only major win came from Brett Riley at Silverstone, powered unusually by a Neil Brown tuned Triumph engine, although only three cars finished.