RCV Performance manufactured the original 30-spline Toyota birfield joint and axle sets sold by Bobby Long and Longfield until the Longfield brand was acquired byTrail Gear, Inc. These original authentic 30-spline Toyotabirfield sets continue to be made by RCV Performance in the USA in Loves Park, IL, and are now only available factorydirect through RCV Performance or our dealers. RCV Performance now calls them the "Ultimate 30-Spline CV AxleSet." These have 300M internal components and gun-drilledCVs joints to separate us from the competition. These shaftsare backed by RCV Performance's "No Questions AskedLimited Lifetime Warranty!" RCV is also your source forCV joint reconditioning which will bring your worn CV's back to factory specs, as well as custom axles made to order!