Manufactured by Teraflex. These TeraFlex JK/JKU & TJ/LJ SpeedBump Mounting Sleeves w/ Integrated Clamp allow custom mounting of 3" Stroke Rear Prerunner SpeedBump Bump Stops (# 1958260) in the rear of a JK/JKU as well as custom applications. Weld the mounting sleeve to the frame to mount the rear bump stop. FITS: � JK Wrangler (2-door) � JKU Wrangler Unlimited (4-door) � Custom applications SPECS: � TRAVEL: 3� INCLUDES: � SpeedBump bump stop mounting sleeves w/ integrated clamp - pair NOTES: � Cutting & welding required. � Extensive frame modification required to install SpeedBump mounting sleeves.