Longfield 30 Spline Birfield and Axle Kit FJ40 The new 30 spline axle kit is a perfect match for your next budget build. This kit offers an 76.0 percent increase in strength over stock axles without breaking the bank. With larger tires and more horsepower being used on the trails these days, upgrades to your axle are more critical than ever.
In a Toyota, one of the common failures are the stock 27-spline birfields and axles. The solution to this problem is our Longfield 30-Spline 4340 Chromoly Axle and Birfield Kit. These birfields and axles will get you to wherever you need to go and give you confidence and peace of mind to run any trail.
The Longfield birfields are made out of 100.0 percent 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.
- Warranty: 12 Month Limited Warranty
- Sold As: Kit
- Material: Chromoly
- Finish: Polished
- Color: Grey
- Spline: 30-Spline
- Fits: 1960-1983 Toyota FJ40