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Valve Springs JPM dual

Valve Springs JPM dual

Valve Springs JPM dual Heavy Duty type 1

Article code: GPPCSP109623020JPM

These heavy duty dual 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 contains eight dual valve springs

inner diameter: 15.7mm
outer diameter: 32mm
spring pressure at 39.6mm install height: 93kg
spring pressure at 25.4mm: 181.3kg
compressed height: 20.4mm

€ 209.00