OEM Rep. Spring Kit, H.T. Steel, 0.415″ Lift, HD® Shovelhead 80″ 1978-1983 – 20-20850


5 in stock (can be backordered)



MAX LIFT .415″

5 in stock (can be backordered)


This KPMI® O.E.M. replacement kit is designed to give stock pressures and work with stock cam profiles. This kit is manufactured to original O.E.M. specifications using premium modern materials, design protocols and manufacturing techniques. All of the components in this O.E.M. style spring kit are the high quality parts you expect from KPMI®. Valve springs are wound from Super Clean chrome silicon valve spring wire that has been heat treated and shot peened. The retainers, keepers, and bases are modeled using FEA analysis to maximize mechanical strength. Components are interchangeable with O.E.M. components unless otherwise noted.

Installation Instructions Click Here
Type Intake/Exhaust
Retainer Material H.T. Steel
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.


Additional information

Weight 1 kg
Dimensions 22 × 12 × 8 cm


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