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) Tear 30 & Tear 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)