Meritor air disc brake caliper upgrade kits provide a simple bolt-on replacement solution compatible with existing Bendix and WABCO trailer calipers. The existing brake chambers, rotors, and torque plates can be re-used so only the pads and calipers need to be replaced on the vehicle. Meritor EX+ L calipers have a sealed housing design which provides protection from water and helps prevent contamination. The gear-driven adjuster gives optimal running clearance and allows for even pad wear. The caliper upgrade kits have been test-fitted and approved by Meritor engineering on Hendrickson INTRAAX suspensions.