Hel Performance Carbon Fibre Brake Pad Shims Toyota GR Yaris 20+

HEL Performance have pulled out all the stops when developing their carbon fibre brake pad shims. They've used the finest carbon fibre, combined with an exclusive resin which is non-combustible and thermally resistant to temperatures over 400°C (752°F). This special resin cures an attractive deep orange against the black fibres.

These don't just look the part though: initial testing carried out by a professional racing driver in various road and track conditions showed an impressive temperature drop of between 30–40%* on both front and rear calipers.

HEL carbon fibre shims come in at a super-lightweight 3.5 grams per shim, compared to weighty titanium which are a typical 17 grams per shim. That's a dramatic 79% weight saving.

That's not the only comparison which makes titanium inferior though: carbon fibre also has a much lower heat conduction compared to titanium (1W/mK compared to 22W/mK for titanium and 65W/mK for steel). Anything that helps reduce the temperature and increase efficiency of brake components is a good thing, especially as caliper seals are at risk of being damaged when they get too hot.

Installing these carbon fibre brake pad shims will certainly inspire confidence that when you brake aggressively, all the components are being kept cool and working at their best.

You can also re-use the shims when changing pads, as long as they're in a good condition.

* more details including a results graph will follow in the next few weeks.