RG500 refurbished seat outer 2x L&R 12440 & 12450-20A03

The OEM seat outer valves use pertinax inner coating, after 40 years the glue becomes weak and the pertinax get lose from the aluminium. This pertinax will kill your cilinder piston and maybe your conrods. So check them asap for that problem we made this set:

its refurbished, we took out the inner pertinax coating and modified the depth so you can use the OEM steel rotating discs (0,7mm) BUT take care the discs are flat!! damage make them thicker.

send over your old 4 seat outer valves 2x L and 2x Rh and become this set.