Aprilia RS660 2021 castellated caliper pistons for Brembo caliper

Aprilia RS660 2021 Titanium caliper piston set of 4 The castellated contact edge is to allow airflow into the piston cavity as well as reducing the contact area with the pad and reducing the amount of heat going into the piston and heating the brake fluid. 4 x 32mm wide pistons OEM Aluminium pistons are very conductive which means the heat from the pad transfers quickly to the brake fluid, Titanium reduces this heat transfer These pistons are slightly heavier than aluminium pistons but half the weight of steel pistons. This part was made as a performance upgrade to the original steel part which corrodes and damages the seals causing the caliper to leak. These pistons have a Titanium Nitride (TiN) coating which is harder than the metal beneath and will also reduce friction with the caliper seals. The coating also gives a beautiful gold colour.  It’s a shame it’s hidden within the caliper Titanium has an excellent property in that it’s a poor conductor of heat, so it’ll keep heat away from the brake fluid Fits the following bikes: Aprilia RS660 2021 Only fits Brembo calipers