Amazon.com: SHIMANO Deore XT BL-M8100/BR-M8120 Disc Brake and Lever - Front, Hydraulic, Post Mount, 4-Piston, Finned Metal Pads, Black : Sports & Outdoors
Shimano Deore XT Hydraulic Disc Brake Caliper - Tam Bikes
Shimano Deore XT BR-M8020 4-Piston Disc Brake Caliper w/ RESIN FIN Pads Set H03A 689228636781 | eBay
First test: Shimano XT M8100 and SLX M7100 disc brakes – lots of power at a fair price | ENDURO Mountainbike Magazine