Fitment questions?
Call (855) 786-7101 or text (801) 304-3141.
Real people. Real answers.
Product details
Reducing the conductive path from pad to fluid is the purpose of this 1.38-inch Thermlock piston. The 1.050-inch length and multi-part construction must both suit the original caliper, rather than being chosen by diameter alone. Wilwood Engineering, founded by Bill Wood in 1977, is a Camarillo, California designer and manufacturer of disc brake systems. Calipers and rotors sit alongside master cylinders, valves, fittings and brake lines in its range for motorsport, street-performance and specialized applications. Selecting a service part requires matching the complete system's operating and installation needs.
Technical Details
- Manufacturer part number: 200-7554
- Piston construction: Thermlock
- Material: Aluminum shell with stainless steel shield
- Piston outside diameter: 1.38 in
- Piston length: 1.050 in
- Finish: Anodize
- Supplied component: One caliper piston; verify the required seal separately
Fitment & Compatibility
Wilwood identifies XT6R, Aerolite 6/4R, SL, NDL, NDP, GN III, DPR and GN6R applications. Use the exact caliper service data to establish which bore accepts this diameter and whether the assembly calls for Thermlock construction.
Wilwood product specifications · Thermlock piston application guide
With over 20 years of experience, PMB Performance can help you identify the correct service hardware and check how it belongs in the complete assembly.
