Shovelhead heads OEM Bore, DUAL INDEPENDENT Intake

(1 customer review)

US$2,030

Shovelhead Heads, OEM Bore by Speed And Science ®. CNC Billet Aluminum Headset for the Harley-Davidson™ Shovelhead models, with Dual (independent) CNC Billet Aluminum Intake Manifolds

 

Please call for availability

Description

Shovelhead Heads OEM Bore by Speed And Science®. Billet Aluminum (6061-T6) Heads/Intake system for the Harley-Davidson™ Shovelhead models.

  • Bolt-on installation for all ’66-’84 72CUI or 80CUI models, designed to match OEM shaped pistons (not supplied) – including all available overbore sizes.
  • This system achieves very strong torque curve and very respectable HP that peaks exactly where needed.
  • Our product is user-friendly and easy to service down the road also. No custom pistons, valves, guides, fasteners, etc. to worry about.
  • Fast, very efficient ports designed to make peak power/torque within the useful RPM range. Your bike will pull hard from the get-go all the way up to the redline. The longevity and fuel mileage won’t suffer either.
  • Proprietary, super-fast design of the combustion chamber yields 10.35:1 calculated compression ratio with OEM-shaped pistons (@ 80CUI). Works well on the hi-octane (e.g. North American 94) pump gas. Compression releases included for easy starting.
  • Valvetrain (AV&V and KPMI) components accept up to .625” valve lift, with almost .200” lift before valve-to-valve contact. Using tall camshafts may require an additional machining to provide necessary clearances.
  • Increased cooling area drops the head’s operating temperature up to 35F.
  • Dual (independent) CNC Billet Aluminum Intake Manifolds (seals included). Carb interface: 41.4MM ID, 2-3/4″ x 5/16″ bolthole spacing. We have completely redesigned the Intake <–> Head interface to eliminate vacuum leaks.
  • Exhaust interface accepts both OEM single-bolt flanges as well as the aftermarket three-bolt pattern.
  • Hi-tensile steel thread inserts (headbolts, intake, exhaust) installed; all original thread sizes, no need for “special” fasteners.
  • OEM oil drain location.
  • ***The difference in surface finish between the Intake (coarser) and Exhaust (smoother) ports is intentional.
  • Warranty details and conditions are listed in the Installation Manuals ( Manuals download page )

Additional information

Weight22 lbs
Dimensions22 × 12 × 6 in

1 review for Shovelhead heads OEM Bore, DUAL INDEPENDENT Intake

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  1. The Man I’m building the bike for just seen your heads,
    He was over the moon never seen anything like them,
    He said you would see such workmanship and design on a MOTO GP heads.

    Needless to say he was very impressed indeed.

    Grant Eadie
    Penrith Motorcycles.

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