Manley
Manley, valve spring kit. Steel. Std to .600" lift
Manley, valve spring kit. Steel. Std to .600" lift
Couldn't load pickup availability
Includes steel top collars; steel lowers; a beehive style spring set; early style seals and a seal installation tool. Can be used as a direct replacement from stock up to .550" lift. Machining is not required. Manley recommends the use of the included earlier style Viton oil seals and not the oil seal-lower collar set-up as used by The Factory. Pressure: 150lbs@1.800"; 355lbs@1.200". Coil bind: 1.085".
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Why buy from Forty5°
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Verified compatibility
Every part we ship is checked against your bike's platform, year, and engine. If it doesn't fit, we tell you before you check out.
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Workshop installation
Book a serviceHave us fit it. Book installation at parts intake — same-day on most jobs, master techs only.
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Founder-led aftersales
Get in touchQuestions after fitment? You'll speak to the people who installed it. We answer email and WhatsApp seven days a week.