Andrews S-Grind Camshaft – 1937-1947 Harley-Davidson Knucklehead

As amazing as it sounds, there are lots of Knuckle engines still going strong. Knuckles have been around for almost 80 years! How many other motorcycles can make this kind of a claim for long life and durability? Old Knuckles Run Forever! When purchasing camshafts be sure to make sure they are correct for your model, refer to your manual for cam replacement procedures, and be aware you will need to change intake and exhaust components to achieve maximum results. See below for camshaft specifications, and Additional Information for complete fitment information.

• This cam is the Knuckle equivalent of a “B” cam in a Pan/Shovel motor
• Bolt-in performance cam
• Smooth idle, strong pull to 6000 rpm
• Made in the U.S.A.

Specifications:

• Grind: S
• Intake Lift At TDC: 0.130″
• Intake Open: 27 °
• Intake Close: 55°
• Intake Lift: 0.370″
• Intake Duration: 262°
• Exhaust Lift: 0.370″
• Exhaust Duration: 262°
• Exhaust Lift At TDC: 0.130″
• Exhaust Open: 55°
• Exhaust Close: 27°