The Copper cylinder head gasket 0.05 mm is the finest thickness available for engines TM KZ-R2. In a competition motor as the KZ, every hundredth of a millimeter count. This seal makes it possible to adjust with surgical precision your squish (Height between the piston and the cylinder head at the high-standing point) to optimize the combustion without risking the detonation.
The choice of copper guarantees excellent thermal conductivity between the cylinder and the cylinder head dome, thus promoting a homogeneous cooling.