HEL Brake pad shims
HEL Shims are made of carbon fiber and fireproof resin.
They are useful for insulating the brake calipers and consequently the oil and brake lines from the heat generated by the pads during sports driving and trackdays.
Several tests carried out by professional drivers have shown that HEL pads reduce caliper temperatures by as much as 49°C (on average) compared to a caliper without pads.
Compared to titanium and even more to the steel of the standard anti-vibration plates, carbon fiber has a much lower thermal conduction (carbon: 1W/mK, titanium: 22W/mK, steel: 65W/mK).