Speed & Science Billet Aluminium Heads, Shovelhead

Speed & Science Billet Aluminium Heads, Shovelhead

Product no.: sns_heads_

Delivery period: 14-21 working days

from 2,078.00 / pair(s)
Price incl. VAT, plus delivery


Speed & Science Billet Aluminium Heads, Shovelhead
- all new developed Billet Aluminium Cylinder Heads by Speed & Science, Canada
- optional for OEM Bore (74cui and 80cui engines) or 3-5/8" Big Bore Engines (S&S Sidewinder Pistons recommended)
- optional bare (w/o Valves, Guides, Springs, Seats) or fully assembled (ready to install)
- CNC machined from 6061-T6 Aluminium
- all new developed port and chamber geometry for respectable HP gains while still maintaining good engine lifetimes
- calculated compression ratio with Standard Pistons (80cui): 10.35:1
- calculated compression ratio with 3-5/8" Big Bore Pistons: 10.05:1 with 4-1/4" Stroke (10.55:1 w. 4-1/2" and 10.80:1 with 4-5/8" Stroke)
- Hi-tensile steel thread inserts (headbolts, intake, exhaust) installed; all original thread sizes, no need for “special” fasteners
- Increased cooling area drops the head’s operating temperature up to 35F
- completely redesigned Intake <–> Head interface, thus eliminating vacuum leaks
- OEM oil drain location
- can be ordered with 40mm dual independent Manifolds (2 Keihin CV or Mikuni HSR40), or Single Manifold (CV, Super E, Super G)


Browse these categories as well: Top End, Cylinder Heads, Speed & Science