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Springs (OEM Replacement), Cr-Si, Intake/ Exhaust, HD® Shovelhead 80", 1978-1983

Springs (OEM Replacement), Cr-Si, Intake/ Exhaust, HD® Shovelhead 80", 1978-1983


Regular price $47.94 USD
Regular price $47.94 USD Sale price $47.94 USD
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California Prop 65

All KPMI valve springs are designed in house using sophisticated, proprietary design and simulation software programs. Our engineers, software, and 80 years of experience enable us to determine critical characteristics including stress, natural frequency, system harmonics, and fatigue life. Our spring manufacturing partners are U.S based companies that are ISO certified. The Super-Clean Chrome-Silicon valve spring wire we use is traceable back to Kobe Japan where some of the best spring wire in the world is manufactured. Each spring goes through a rigidly controlled heat treatment, stress relief, and shot peening process.
Combining our design, simulation, and manufacturing protocols with this premium quality valve spring wire allows KPMI to supply you with the best possible valve springs period.


Type Intake/ Exhaust
Material Chrome Silicon
Quantity Pkg. of 4
Valve Lift 0.415"
Installed Height 1.375"
Seat Pressure 129#
Open Pressure 272#
@ Lift 0.415"
Note This basewasher is counterbored allowing for a 0.720" outside diameter seal to sit inside the base for additional seal to retainer clearance.
Unique Identifier No. FR327789_01GAUS
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