Inner valve springs for OKRASA preparation moulded foot motors - set of 8

This set of 8inner valve springs for OKRASA preparation die-cast engines is compatible with engines fitted with 33mm high-lift camshafts.

They complement the original springs, inside the latter, to increase pressure on the valve seats and compensate for the increased compression of the moving assembly.

Specific to Okrasa-type preparations, they increase the pressure on the valve seats (10 to 15 lbs, or 4.5 to 6.8 kg).