HEL carbon brake pad shims, AP Racing CP5570 calipers

HEL carbon fibre brake pad shims, AP Racing CP5570 calipers

HEL Performance carbon fibre thermal shims fit between the brake pads and caliper pistons to reduce heat transfer into the caliper. This kit is intended for the following application: AP Racing CP5570 calipers.

The shims are manufactured from high-quality carbon fibre combined with HEL Performance’s specially developed non-combustible resin, which withstands temperatures above 400 °C. The cured resin may be yellow or orange depending on the production batch.

Carbon fibre has a thermal conductivity of approximately 1 W/mK, compared with around 22 W/mK for titanium and 65 W/mK for steel. This helps slow heat transfer from the brake pad to the caliper pistons. Each shim weighs approximately 3.5 grams, compared with a typical 17 grams for a titanium shim.

• Application-specific carbon fibre thermal shims
• Fit between the brake pads and caliper pistons
• Help reduce heat transfer into the brake caliper
• Help protect caliper seals from excessive heat
• Temperature resistance above 400 °C
• Very low thermal conductivity of approximately 1 W/mK
• Weight of approximately 3.5 grams per shim
• Approximately 79% lighter than a typical titanium shim
• Suitable for road, track and competition use
• May be reused during a brake-pad change if the shims remain in good condition
• HEL Performance part number HCFS-4-008

Manufacturer temperature test

In HEL Performance’s initial test, a professional driver evaluated the shims in a range of road and track conditions. The front-caliper temperature fell by an average of approximately 49 °C.

The achieved temperature reduction depends on the vehicle, braking system, pads, speed and operating conditions. The table presents the results measured in the manufacturer’s own test.

Compatible brake calipers

• AP Racing CP5570 calipers

Check the part number and the exact brake-pad and caliper design before ordering. Brake specifications can vary by engine, model year and factory equipment even within the same vehicle model.