We are now the USA distributor for all Supertec Racing products. Supertec Racing is the leading authority on spline drive kits for the RB platform. They also produce other RB parts such as coil bracket kits and brake parts. Being the USA distributor we are focusing our efforts to supply and offer all spline drive kit parts as well as installation. We are excited to be a part of the Supertec Racing team. Please contact us for pricing/availability and if you need installation of any spline drive kit for your RB crankshaft.