The S&S KN420 cam is a high-lift cam for modified knuckle engines. Features .420 inch valve lift and increased duration for larger engines up to 93 inch and compression ratio of up to 8.5:1. Special high-lift valve springs are required. Designed to be used with solid lifters.
Fits 1936-1947 OHV Big Twin engines and Flathead Power KN-Series engines.
Product Note:Only fits OHV Big Twin or Flathead Power KN-Series engines.
Fitment is guaranteed or your money back plus free return
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