Chevrolet Performance 12558060 Cylinder Heads, SBC Vortec Engines
Chevy Small Block V8, Assembled Cylinder Head Style, Cast Iron, Not CNC-Machined Runners
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These cast-iron Vortec cylinder heads are from Chevrolet Performance are designed to fit Small Block Chevy Vortec engines. These heads come completely assembled and ready for install.
- Completely assembled with 1.940"/1.500" valves
- Uses bare head 12529093
- 64cc combustion chamber
- Straight spark plugs
- No heat risers
- Requires Vortec-specific intake manifold
- Can be machined for 2.020"/1.600" valves
- Rocker arm studs can be pinned or drilled and tapped to 3/8"
- Valve spring seat diameter is 1.280
- Casting number 10239906 or 12558062
Note: Camshafts with more than 0.475" lift require machining valve guide bosses and checking valve seal to valve spring retainer clearance
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