JK Dana 30 Axle Housing Inner Sleeve Kit Jeep JK 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 2007 Up Jeep JK Dana 30;Made in the USA Synergy Manufacturing Synergy Manufacturing JK Dana 30 Axle Housing Inner Sleeve Kit - 8012-09 8012-09 Axle Truss