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Chevrolet Performance 12558060 Cylinder Heads, SBC Vortec Engines
Chevrolet Performance 12558060 Cylinder Heads, SBC Vortec Engines

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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Chevrolet Performance 12558060 Cylinder Heads, SBC Vortec Engines
Chevrolet Performance 12558060 Cylinder Heads, SBC Vortec Engines
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Part # 35512558060
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  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.

Details

Cylinder Head Style:
Assembled
Material Type:
Cast Iron
Combustion Chamber Volume:
64cc
Intake Runner Volume:
170cc
CNC-Machined Runners:
No
CNC-Machined Combustion Chamber:
No
Spark Plug Style:
Straight
Intake Port Location:
Standard
Exhaust Port Shape:
Square
Exhaust Port Location:
Standard
Intake Valves Included:
Yes
Exhaust Valve Diameter:
1.5"
Exhaust Valves Included:
Yes
Valve Spring Included:
Yes
Spring Diameter:
1.25"
Number of Springs Per Valve:
Single
Maximum Lift:
0.475"
Machined for O-Ring:
No
Valve Seats Machined:
Yes
Valve Stem Seals Included:
Yes
Valve Stem Seal Type:
Umbrella
Valve Guides Included:
Yes
Locks Included:
Yes
Lock Style:
7 Degree
Retainers Included:
Yes
Retainer Material:
Steel
Rocker Arms Included:
No
Rocker Arm Studs Included:
Yes
Rocker Arm Nuts Included:
No
Oiling Style:
Through Pushrod
Heat Crossover:
No
Steam Holes Drilled:
No
Accessory Bolt Holes Drilled:
Yes
Sold in Quantity:
Each
MFG. Part #:
12558060

Info

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

Some parts are not legal for use in California or other states with similar laws/regulations

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