SEMI-MACHINED SPLAYED-VALVE ALUMINUM CYLINDER HEAD - 12480147
Part # 12480147
- Extremely aggressive, all-out competition head
- Main surfaces are machined; exhaust bolt pattern, valve guides and spark plug holes are machined
- Head bolt holes, dowel holes, intake bolt holes, pushrod holes are not machined
- Valve seats, spring seats and rocker stands are not machined
| Item# | Description | Qty. | Your Price | |
|---|---|---|---|---|
| 12480147 |
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Semi-Machined Splayed Valve Aluminum Cylinder Head
P/N 12480147
- Main surfaces are machined; exhaust bolt pattern, valve guides and spark plug holes are machined - Head bolt holes, dowel holes, intake bolt holes, pushrod holes are not machined - Valve seats, spring seats and rocker stands are not machined - 240cc "as-cast" intake ports - 78cc "as-cast" exhaust ports - 45cc "as-cast" combustion chambers - Same casting as P/N 12480146Aluminum Splayed Valve Race Head Technical Notes:
- Made of 355-T7 aluminum
- No valve seats or guides provided
- Extra-thick decks for angle milling or heavy flat milling
- Extra port material (0.240") for professional porting
- Completely revised intake and exhaust ports provide ultimate airflow potential
- 45cc "as-cast" combustion chambers
- Modified valve angles (16 ° x 4 ° intake, and 11 ° x 4 ° exhaust)
- Designed for longer-than-stock 2.200" and 1.650" valves
- Valve spring pads accommodate 1.625" diameter springs
- Revised location angled spark plugs (14mm, 5/8" hex, 3/4" reach, gasketed plugs)
- Designed for aftermarket shaft-mount rocker systems
- Custom-fabricated intake manifold required
- P/N 10185042 intake manifold gasket required
- Valve cover gaskets P/N 10185043 required
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