1971-1979 Cylinder Head 85.5mm Dual Port with Performance Valves
When replacing your cracked Cylinder Heads, it is best to replace with one that will last as long or even longer than your original German Quality Head. These Cylinder Heads are made from high quality special aluminum alloy in a permanent mold casting which makes a stronger Cylinder Head that functions just as good as it looks. This all new casting features an increased port wall thickness for porting, bronze valve guides, and has a 3/4" reach for the 12mm Spark Plugs that have been moved away from the valve seats to eliminate stress cracks. This Cylinder Head is sold Individually and comes with the Performance Valve Job.
- Complete Dual Port Cylinder Head (Each)
- 85.5 Bore Size
- Manley 40mm Intake / 35.5 Exhaust Valves
- Special Aluminum Alloy for Strength
- Permanent Mold Casting
- Stainless Steel 3 Groove Valves
- Single High Rev Valve Springs
- Chromoly Retainers
- Hardened Keepers- Rocker-Exhaust and Intake Studs
- Increased Port Wall Thickness for Porting
- Exhaust Air Passages Clear for Proper Cooling
- Weldable for Custom Work
- 12mm Spark Plug 3/4" Holes
| Chamber Volume |
Intake Port Volume |
Exhaust Port Volume |
| 56cc |
56cc |
66.5cc |
Also known under these part numbers: (For reference only)