Longfield™ FJ40 30-Spline Long Spline Axle & Birfield Kit
The new 30 spline axle kit is a perfect match for your next budget build. This kit offers an increase in strength over stock axles (76% Stronger) without breaking the bank.
The Longfield™ birfields are made out of 100% chromoly and are precision polished to remove any imperfections that may cause stress risers. The Longfield™birfield housing is made out of forged 4340 chromoly steel. The axle shafts are also made out of 4340 chromoly steel. The internals of our Longfield™ birfields are made out of 4340 chromoly steel and heat-treated for superior strength.
The long side axles have an extended spline for Land Cruiser OEM locker applications.The spline length on the diff side is 4.75" Long.
The Longfield 30-spline Birfields allow up to 40 degrees of turning radius and have a consistent breaking point of 8900-9000 foot-pounds of torque (all testing data is based on internal testing at TGI).