CYLINDER HEAD ASSEMBLY SET WITH MATCH PORTED IDF/HPMX MANIFOLD 90.5/92mm 502 SERIES - AA PERFORMANCE

'502 Series' big valve performance cylinder head assembly set with match ported IDF/HPMX manifolds to suit Type 1.

- Two new 502 series twin port cylinder head assemblies with big valves.
- Includes two match ported manifolds to suit IDF/HPMX carburettors.
- Quality AA Performance product.
- Modernised combustion chamber for increased head flow (compared to the 500 series 'Outlaw' heads)
- Second full fin for greater flexibility if fly-cutting is required.
- Blocked-off rocker stud bosses to stop possible oil leaks and eliminating the o-ring.
- Assembled with new valve springs, valve spring hardware and valves.
  - Intake valve: 40mm stainless steel
  - Exhaust valve: 35.5mm stainless steel
- Ideal for 90.5mm and 92mm bore engines.
- Accepts D7EA spark plugs.
- 55cc combustion chamber volume.
- Available as a matched pair.

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