SMALL-BLOCK SPLAYED-VALVE ALUMINUM RACE CYLINDER HEADS
12480146
ROUGH-MACHINED SPLAYED-VALVE ALUMINUM CYLINDER HEAD
- Main surfaces are machined, exhaust bolt pattern is machined
- Head bolt and dowel holes, intake bolt holes, spark plug holes, and pushrod holes are not machined
- Valve guides, valve seats, valve spring seats, and rocker stands are not machined
- Valve locations and angles may be relocated
- 240-cc “as-cast” intake ports
- 78-cc “as-cast” exhaust ports
- 45-cc “as-cast” combustion chambers
12480147
SEMI-MACHINED SPLAYED-VALVE ALUMINUM CYLINDER HEAD
- Main surfaces are machined; exhaust bolt pattern, valve guides, and spark plug holes are machined
- Head bolt holes, dowel holes, intake bolt holes, and pushrod holes are not machined
- Valve seats, spring seats, and rocker stands are not machined
- 240-cc “as-cast” intake ports
- 78-cc “as-cast” exhaust ports
- 45-cc “as-cast” combustion chambers
- Same casting as P/N 12480146
24502517
SPLAYED-VALVE ALUMINUM CYLINDER HEAD
- Semi-machined aluminum race head
- 240-cc “as-cast” intake ports
- 78-cc “as-cast” exhaust ports
- 45-cc “as-cast” combustion chambers
- Same casting as P/N 12480146
12480153
SPLAYED-VALVE 4.500 BORE CENTER ALUMINUM CYLINDER HEAD
- Semi-machined aluminum race head
- Great for drag racing competition with dual carburetors
- As-cast ports and combustion chambers for professional finishing
- Use mid-deck block with 4.500" main bore machining
- Special larger head-bolt pattern, 3/8" fasteners, 19 holes
- 240-cc “as-cast” peanut intake ports
- 78-cc “as-cast” peanut exhaust ports
- 40-cc “as-cast” combustion chambers
88958684
SPLAYED-VALVE 4.500 BORE CENTER ALUMINUM CYLINDER HEAD CUBED
- Great for drag racing competition with dual carburetors
- 240-cc “as-cast” peanut intake ports
- 78-cc “as-cast” peanut exhaust ports
- Cubed aluminum race head
- Bare head, no seats or guides
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