S&S KN420 Camshaft Harley-Davidson Knucklehead 1936-1947

Item Number: 359283

$208.95

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Product Description

S&S Cycle

S&S KN420 Camshaft Harley-Davidson Knucklehead 1936-1947

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.


Spec Details
Cam Duration Exhaust 270 degrees
Cam Duration Intake 266 degrees
Cam Timing Exhaust 60/30 degrees
Cam Timing Intake 31/55 degrees
Country Of Origin USA
Engine Type Knucklehead
Exhaust Lift .152 in.
Exhaust Lobe Center 110 degrees
Intake Lift .167 in.
Intake Lobe Center 102 degrees
Max Valve Lift Exhaust .420 in.
Max Valve Lift Intake .420 in.

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping. Don't waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Harley Davidson

  • FL 1941-1947

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