The Wilwood MC4 Mechanical caliper (part 120-15484-BK) is a right-hand unit in black, listed with a 1.19 in piston and a 1.10 in rotor designation. Buyers looking for a mechanically actuated Wilwood caliper in this exact orientation should match the side and rotor size before ordering, since a right-hand unit will not work on the left side of a vehicle. Choosing a caliper with a known piston size and rotor match is a practical way to avoid guesswork when planning a brake upgrade or rebuild.
Useful search terms for this part include Wilwood MC4 mechanical caliper right hand, 120-15484-BK caliper, Wilwood black caliper 1.19 piston, and MC4 caliper 1.10 rotor. Confirm mounting bracket compatibility, hydraulic and mechanical connections, and bleeding procedure against the manufacturer's installation documentation before installation, because those details were not verified for this listing.
