Pro Plus Racing Coilovers – Extensive research, development, engineering, testing, modification and experience from actual competition use has been used over many years to develop this line of coilovers. Pro Plus Racing coilovers enable both you and your team to fine tune the coilover setup for any time attack, endurance racing or circuit racing competitions. Enhanced tires are recommended for use with Pro Plus Coilovers for the ultimate handling and performance from your vehicle.