The Aeroflow Performance fuel injector service kit contains the most common components required to rebuild most fuel injectors. All fuel injectors require quality service and repair components over the life of the injector to ensure the longevity of each one. This will ensure correct fuel flow through the each injector and for safety reasons the long term continuous sealing of fuel under pressure through a range of extreme temperatures and operating conditions. We recommend new seals be fitted whenever an injector is removed from its sealing surface. The renewal of any "buffer" rubbers is also required to ensure the correct seating and location of the injector. This kit contains buffer seals, body seals, filters, space washers, lower seals, as well as upper and lower O-rings. Each kit is available in Viton for regular unleaded fuels and Buna material for E85 and alcohol based fuels.