Longfield™ 30-Spline Birfield
This Longfield™ 30 spline birfield offers an increase in strength over a stock birfield. (76% Stronger) Reminder:This birfield comes with a 12 month warranty against breakage and has single heat treated internals.
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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 internals of our Longfield™ birfields are made out of 4340 chromoly steel and heat-treated for superior strength.