550" lift double valve spring kit for 1948-'84 Harley-Davidson® panhead and shovelhead engines.
- Includes 4 inner springs, 4 outer springs, and 4 aluminum top collars.
- Use with stock-style bottom collar, valve guides, valves with stock 3/8" stem, and stock keepers.
- Compatible with thin-stem valves if thicker keepers that maintain correct valve stem-top collar engagement are used.
- Late single bottom collars are included for use in S&S cylinder heads for shovels and stock late 1981–'85 heads.
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Excellent kit!!
Used them in my top end refresh. 72 Shovel. Love them!!! S&S Rules!!!!!!
51-1027_springkitshovelpan_20060425.pdf
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