Sparco 3" competition harnesses are used by some of the most popular Formula One, IndyCar, and Sports Car teams. Sparco lap belts feature an aircraft quality spring loaded quick release camlock system. This system ensures immediate evacuation in case of vehicle fire. All 3" belts are SFI homologated NOTE: 48" individual shoulder harness are ideal for use in vehicles that have roll cages with the horizontal cross bar fabricated directly behind the drivers seat. All 3" harnesses are SFI homologated and FIA Homologated. Pull Up Lap Belts are recommended for Bucket seats Additional mounting kits required. You will need one kit for each mounting point that will attach to the vehicle. You will not need one for points mounting to roll cages and harness bars. Please contact us if you have any additional questions.