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Valve Springs JPM Single

Valve Springs JPM Single

Valve Springs JPM Single Heavy Duty type 1

Article code: GPPCSP109623010JPM

hese heavy duty single valve springs were developed together with the JPM MS230 cylinder heads but can be used on every other Type 1 (or with some modifications on Type 4) cylinder head.
They are made out of shot peened, heat treated OTEVA 90 material, a spring steel also used in NASCAR engines. The kit contain eight valve springs.

inner diameter: 23.6mm
outer diameter: 32mm
spring pressure at 39.6mm install height: 50.4kg
spring pressure at 25.4mm: 103.3kg
compressed height: 20.4mm