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Engine Parts - Cylinder Heads

Cylinder Head
Your Price:
$869.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Cylinder Head

676-18-4484HP

Key Features:

  • CH350HA: 5.7L Hybrid early style 350 Cylinder Head
  • 65cc combustion chamber, 176cc intake runner
  • 1.94 intake valve, 1.50 exhaust valve
  • Early intake bolt pattern, perimeter valve cover bolt pattern

Additional Details:

  • ATTENTION: REPLACE IN PAIRS

Cylinder Head
Your Price:
$851.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Cylinder Head

676-18-4485HP

Key Features:

  • All GM cylinder heads utilize high performance screw-in rocker arm studs
  • Cylinder heads are new castings
  • Complete assemblies with new stainless steel valves
  • Hardened steel exhaust seats, valve springs, valve locks and retainers
  • Fits: Vortec GM small block 5.7L high performance
  • CH350GA: 5.7L Hybrid Pre-Vortec 217 style casting
  • 65cc combustion chamber, 176cc intake runner
  • 1.94 intake valve, 1.50 exhaust valve
  • TBI/Vortec style bolt pattern/Center bolt valve cover

Additional Details:

  • ATTENTION: REPLACE IN PAIRS

Cylinder Head
Your Price:
$789.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Cylinder Head

676-18-4486HP

Key Features:

  • All cylinder heads are new castings
  • Complete assemblies with new stainless steelvalves
  • Hardened steel exhaust seats, valve springs, valve locks & retainers
  • High performance screw-in rocker arm studs
  • Fits: Vortec GM small block 5.7L high performance
  • CH350CA: 5.7L Late model vortec 350(906GM casting)
  • 64cc combustion chamber, 172cc intake runner
  • 1.94 intake valve, 1.50 exhaust valve
  • Late model bolt pattern 1996 and Up with a perimeter valve cover
  • Direct replacement for late model vortec heads

Cylinder Head
Your Price:
$929.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Cylinder Head

676-18-4493HP

Key Features:

  • 454/7.4L GM Vortec Head Universal
  • GM Casting 12560241, 10141279
  • 100cc combustion chamber, 246cc intake runner

Cylinder Head
Your Price:
$887.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Cylinder Head

676-18-4501HP

Key Features:

  • Cylinder heads are new castings
  • Complete assemblies with new stainless steel valves
  • Hardened steel exhaust seats, valve springs, valve locks and retainers
  • High performance screw-in rocker arm studs in place of pressed in studs
  • Fits: Vortec GM small block 5.0L
  • Add 30hp to stock motor w/no additional modifications
  • CH305BA: 305/5.0L GM Vortec Head
  • GM Casting numbers 12552520, 12557113, 12558059
  • 58cc combustion chamber, 170cc intake runner
  • 1.84 Intake valve, 1.50 exhaust valve
  • Direct GM Replacement

Cylinder Head Assembly
Your Price:
$1,066.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Cylinder Head Assembly

676-18-4489

Key Features:

  • New stainless steel valves, hardened steel exhaust seats, valve springs, valve locks and retainers
  • GM cyl. heads utilize high performance screw-in rocker arm studs in place of factory press studs
  • Fits: 2.5L/3.0L GM (1968-95)

Interchanges/Replaces

Mallory

  • 9-59000

Mercruiser Stern Drive

  • 936-5544
  • 936-809890
  • 936-810840
  • 938-8M0115134
  • 938-8M0115135

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-47268Valve Seal
18-47288Valve Spring
18-47308Valve Retainer
18-473116Valve Lock
18-47324Intake Valve
18-47364Exhaust Valve
18-47378Rocker Arm Stud

Cylinder Head Assembly
Your Price:
$903.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Cylinder Head Assembly

676-18-4485

Key Features:

  • New stainless steel valves, hardened steel exhaust seats, valve springs, valve locks and retainers
  • GM cyl. heads utilize high performance screw-in rocker arm studs in place of factory press studs
  • Fits: 5.7L V-8 GM (1987-95) w/press in rocker arm studs w/12 intake manifold mntg bolts

Additional Details:

  • Intake Manifold Bolts: 4 inside at 23 degrees
  • Valve Covers: Center Mount

Interchanges/Replaces

Mallory

  • 9-59004

Mercruiser Stern Drive

  • 938-883490
  • 938-883490R1
  • 938-883490R50
  • 938-884741R
  • 938-884741R50
  • 938-9718

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-47268Valve Seal
18-47288Valve Spring
18-47308Valve Retainer
18-473116Valve Lock
18-47324Intake Valve
18-47334Exhaust Valve
18-47378Rocker Arm Stud

Cylinder Head Assembly
Your Price:
$789.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Cylinder Head Assembly

676-18-4486

Key Features:

  • New stainless steel valves, hardened steel exhaust seats, valve springs, valve locks and retainers
  • GM cyl. heads utilize high performance screw-in rocker arm studs in place of factory press studs
  • Fits: 5.7L V-8 GM Vortec (1996-Up) w/press in rocker arm studs w/8 intake manifold mmtg bolts

Additional Details:

  • Valve Cover: Composite

Interchanges/Replaces

Mallory

  • 9-59005

Mercruiser Stern Drive

  • 938-803860T
  • 938-883297 1
  • 938-8M0115137

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-47268Valve Seal
18-473116Valve Lock
18-47324Intake Valve
18-47334Exhaust Valve
18-47278Valve Spring
18-47298Vortec Valve Retainer

Head Bolt Kit
Your Price:
$183.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Head Bolt Kit

676-18-4508

Key Features:

  • High performance head bolt kit - small block GM

Additional Details:

  • Thread Size: 7/16"-14UNC