Manufactured by Teraflex. The TeraFlex JK/JKU Axle Sleeve Kit is designed to reinforce the weak axle tubing on JK/JKU Dana 30 or 44 factory axles. This prevents unwanted bending or breaking under extreme conditions. FITS: � JK Wrangler (2-door) Tera30 & Tera44 front axle � JKU Wrangler Unlimited (4-door) Tera 30 & Tera 40 front axle INCLUDES: � Short side inner axle sleeve � Long side inner axle sleeve NOTE: � Does not fit Rubicon Recon w/ Dana 44 front axle w/ 3/8� wall. INSTALL TIME: 4 Hours (Sleeve Kit)