Toyota, 30/30 Spline Nitro Chromoly Birfield Joint component Nitro Gear & Axle

Product Description: 

These Nitro 30 spline birfield joints offers you a 75 percent increase in strength over Toyota's 27 spline stock birfield. Made from 100 percent 4340 chromoly thus adding strength where it is needed. Wherever your travels lead you, this Nitro 30 spline birfeild joint will give you the confidence and peace of mind to run any trail.

These are a HD 30/30 spline upgrade. Component only! Compatible with and are replacement outer Birfield joints for the following axle up-grade kits: AXTBIRF-30-KIT, AXTBIRF-FJ40KIT, AXTBIRF-FJ60KIT, or AXTBIRF-LJ70KIT.

  • Made out of 100 percent chromoly
  • 75 percent increased in strength
  • Precision polished
  • Made out of 4340 chromoly steel
  • Heat-treated for superior strength
  • Axle Splines: 30 inner, 30 at hub
  • Material: 4340 Chromoly Steel
  • Warranty: Lifetime

Tech Note:

  • Does not fit stock axles.
  • Stock axles are 30/27 spline.


  • 1969-1983 Toyota Land Cruiser FJ40 front FJ45 front
  • 1968-1979 Toyota Land Cruiser FJ55 front
  • 1981-1987Toyota Land Cruiser FJ60 front HJ60 front
  • 1988-1990 Toyota Land Cruiser FJ62 front BJ70
  • 1979-1985 Toyota 4x4 Hilux Pickup Front
  • 1984-1985 Toyota 4x4 4Runner Front
  • 1984-1989 Toyota Surf
  • Toyota LJ70 RJ70 Land Cruiser II and Prado
  • SAS Conversions