TJ/XJ/ZJ Dana 30 Axle Housing Inner Sleeve Kit Jeep TJ/LJ/XJ/ZJ Dana 30 Inner Axle Sleeve Kit; Adds 59% Increase In Housing Strength; 2 X .250 1026 DOM Tubing; Requires Drilling And Welding For Installation; For Use In Jeep TJ/LJ/XJ/ZJ Dana 30;Made in the USA Synergy Manufacturing Synergy Manufacturing TJ/XJ/ZJ Dana 30 Axle Housing Inner Sleeve Kit - 5901-30 5901-30 Axle Truss