Although the SR4 car shares most of the engine and powertrain components with the SR3, it features entirely new bodywork and an undertray that includes a front diffuser. These changes make it a more capable track car and a popular choice for national racing series. The SR4 replaces the initial 1100 Clubsport model. It is equipped with a Powertec Suzuki 1200cc engine that delivers 190 bhp and is paired with a 6-speed sequential gearbox.