1939-1940 EL Knucklehead Cylinder Head Set with Valve 1939 / 1940 EL
1939-1940 EL Knucklehead Cylinder Head Set with Valve 1939 / 1940 EL
1939-1940 EL Knucklehead Cylinder Head Set with Valve 1939 / 1940 EL
1939-1940 EL Knucklehead Cylinder Head Set with Valve 1939 / 1940 EL

1939-1940 EL Knucklehead Cylinder Head Set with Valve 1939 / 1940 EL

49-1349
$5,551.24
$5,551.24
Shipping calculated at checkout.
Quantity must be 1 or more

1939-1940 EL bare Knucklehead cylinder head set features exact casting marks and details for 1938 61 Knucklehead models. Features a small intake port. Includes valves valve guides springs collars and the lower valve spring cover set installed. *NOTE: Accepts cup valve cover primer caps and large 18mm air cooled spark plugs all items available separately. *NOTE: Accepts large 1-3/8 hex Doering #3 spark plug set. *NOTE: Material of valve seats features a better hardenability and heat resistance than 1.2713. Material is tough with high compressive strength and high tempering resistance. Hardness equals 370-415 HB. Tensile strength equals 1250-1400 N/mn2. Condition is tempered.

FITMENT

  • 1939 / 1940 EL

    • TECH NOTES

  • Suggested to use with #42-3637 Lower Valve Spring Cup Set Parkerized.
  • Suggested to use with #49-0009 Brass Head Primer Cups.
  • Suggested to use with #49-0878 18mm Doering Spark Plug Set.

    • ACCESSORY ITEMS

  • 11-0904
  • 49-0009
  • 49-1310
  • 42-3637

    • Tech Notes

    Suggested to use with #42-3637 Lower Valve Spring Cup Set

    Back to TOP END PARTS & RELATED