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GM Performance 12558060 - GM Performance Vortec Cylinder Heads

  • Cylinder Head, Vortec, Cast Iron, Assembled, 64cc Chamber, 170cc Intake Runner, Chevy, Small Block, Each
  • Application Specific
  • Estimated Ship Date: 5/29/2012
 
BrandGM Performance
Manufacturer's Part Number12558060
Part TypeCylinder Heads
Product LineGM Performance Vortec Cylinder Heads
Summit Racing Part NumberNAL-12558060
 
Cylinder Head StyleAssembled
Cylinder Head MaterialCast iron
Cylinder Head FinishNatural
Combustion Chamber Volume (cc)64
CNC-Machined Combustion ChamberNo
Intake Runner Volume (cc)170cc
CNC-Machined Intake RunnerNo
CNC-Machined Exhaust RunnerNo
Intake Port LocationStandard
Exhaust Port ShapeSquare
Exhaust Port LocationStandard
Spark Plug StyleStraight
Intake Valves IncludedYes
Intake Valve Diameter (in)1.940 in.
Exhaust Valves IncludedYes
Exhaust Valve Diameter (in)1.500 in.
Valve Springs IncludedYes
Outside Diameter of Outer Spring (in)1.250 in.
Damper Spring IncludedNo
Number of Springs Per ValveSingle
Retainers IncludedYes
Retainer MaterialSteel
Locks IncludedYes
Lock Style7 degree
Valve Stem Seals IncludedYes
Valve Stem Seal StyleUmbrella
Rocker Arm Studs IncludedYes
Rocker Arm Nut Thread Size3/8-24 in.
Rocker Arms IncludedNo
Rocker Arm Nuts IncludedNo
Guideplates IncludedNo
Accessory Bolt Holes DrilledYes
Valve Guides IncludedYes
Valve Guide MaterialBronze
Valve Seats MachinedNo
Valve Seat MaterialSteel
Steam Holes DrilledNo
Oiling StyleThrough pushrod
Machined for O-RingNo
Heat CrossoverNo
QuantitySold individually.
NotesRequires Vortec-style intake manifold for installation.
CalculatorCompression Calculator
 

These cast iron Vortec cylinder heads will fit 1958 and later small block Chevy engines, and offer a 20 to 40 HP increase over earlier cast iron small block heads. Features include 64cc fast burn combustion chambers, 170cc intake runners, and a high-velocity LT1 port design. They require the use of a Vortec-style intake and self-aligning rocker arms, and come complete with 1.94 in. intake/1.50 in. exhaust valves, springs, and retainers.

Warranty

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Application

Results 1-1 of 1

 
MakeCHEVROLET
Beginning Year1996
Ending Year2002
Liter5.7
CID350
Engine TypeV8
Engine Size5.7L/350
Engine FamilyChevy small block Gen I
Rocker Arm Mounting Style (application)Stud
Application NotesWill not fit LT1 or LT4 engines.
CalculatorCompression Calculator
 

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Suggested Parts

Suggested Parts: Parts that may improve the performance or installation of part number NAL-12558060.

Results 1-3 of 3

ARP 134-3601 - ARP High Performance Series Cylinder Head Bolt Kits

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  • ARP 134-3601 - ARP High Performance Series Cylinder Head Bolt Kits

Cylinder Head Bolts, High Performance, Hex Head, Chevy, Small Block, Kit

Part Number: ARP-134-3601

Estimated Ship Date: 5/29/2012

Fel-Pro QVS50088R - Fel-Pro Valve Cover Gaskets

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  • Fel-Pro QVS50088R - Fel-Pro Valve Cover Gaskets

Valve Cover Gaskets, Rubber, Chevy, Small Block, Pair

Part Number: FEL-VS50088R

Estimated Ship Date: 5/29/2012

GM Performance 12497760 - GM Performance Intake Manifold Gaskets

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  • GM Performance 12497760 - GM Performance Intake Manifold Gaskets

Gaskets, Manifold, Intake, Composite, 2.16 in. x 1.080 in. Port, .120 in. Thick, Chevy, Small Block, Set

Part Number: NAL-12497760

Estimated Ship Date: 5/29/2012


Related Kit/Combos

Related Kit/Combos: NAL-12558060 is available bundled for easy shopping and proven performance.

Results 1-1 of 1

Summit Racing 08-0034 - Summit Racing® Top End Pro Packs

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  • Summit Racing 08-0034 - Summit RacingĀ® Top End Pro Packs

Combo, Cylinder Heads, Cast Iron, Vortec, Intake Manifold, Aluminum, Edelbrock, Head/Intake Gaskets, Bolts,Kit

Part Number: CMB-08-0034

Estimated Ship Date: 5/29/2012


Repair Parts

Repair Parts: Components of NAL-12558060 that may require future replacement due to normal wear and tear.

Results 1-4 of 4

GM Performance 10212810 - GM Performance Valve Stem Seals

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  • GM Performance 10212810 - GM Performance Valve Stem Seals

Valve Stem Seal, Chevy, Small Block, LT4, Each

Part Number: NAL-10212810

Estimated Ship Date: 6/8/2012

GM Performance 10212811 - GM Performance

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  • GM Performance 10212811 - GM Performance

Valve Spring, Single, 1.250 in. Outside Diameter, Chevy, Small Block, Each

Part Number: NAL-10212811

Estimated Ship Date: 6/4/2012

GM Performance 10241743 - GM Performance Replacement Valves

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  • GM Performance 10241743 - GM Performance Replacement Valves

Valve, Intake, Replacement, Stainless Steel, 1.940 in. Diameter, Chevy, Small Block, Crate Engine, Each

Part Number: NAL-10241743

Estimated Ship Date: 6/4/2012

GM Performance 12550909 - GM Performance Replacement Valves

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  • GM Performance 12550909 - GM Performance Replacement Valves

Valve, Exhaust, Stainless Steel, 1.500 in. Diameter, .344 in. Stem, Chevy, Each

Part Number: NAL-12550909

Estimated Ship Date: 6/4/2012