HKS USA offers import modified cars a wide variety of aftermarket parts to choose from. They range from engine internals such as connecting rods and camshafts to external parts such as full exhaust systems. Since the late 1980s, HKS has been a fierce competitor in many forms of motorsports including drag racing, JTCC, JGTC, F3, D1 Grand Prix, Superbikes, plus many others. They also sponsor many racers carrying the HKS name. Most notably, Anthony Reid (Supertouring/JTCC), Tetsuya Kawasaki (drag racing), Nobuteru Taniguchi (D1 Grand Prix and Time Attack), Akira Iida (Time Attack) have driven for their in-house team.