Chicago Facility: (800) 826-7403 / (773) 624-6111     |     Las Vegas Facility: (800) 426-8771 / (702) 649-7776

Our stock replacement cylinder heads live up to EQ’s reputation for quality parts and incredible service. This assures you of the highest value and quality in cast cylinder heads for Chevrolet vehicles. In fact, if you’re ready to replace a worn out or cracked cylinder head, you won’t find a better product available anywhere.

What Makes an EQ Cylinder Head better than the rest?

  • Highest grade cast iron material used in manufacturing
  • Thicker decks for greater strength
  • Superior port finish for increased flow
  • Improved flow design to resist cracking
  • Redesigned water flow for greater thermal conductivity
  • Hardened exhaust seats
  • CNC machined guides and seats
  • 3 angle valve finish
  • Parts and labor warranty *
  • Assembled heads use OE quality stainless steel valve, springs, retainers, keepers and viton seals.
  • 25 point quality check on every head

 

PART # ENGINE MFG CID LITER YEARS NOTES
CH305B Chevrolet 305 5.0 1996 – Up Replaces casting number:
12552520, 12557113, 12558059                   Intake runner 170CC
Combustion Chamber 58CC
CH305BA Chevrolet 305 5.0 1996 – Up Replaces casting number:
12552520, 12557113, 12558059                   Intake runner 170CC
Combustion Chamber 58CC
ASSEMBLED
CH350A Chevrolet 350 5.7 1955-86 Universal
Intake runner 178CC
Combustion Chamber 76CC
With Heat Riser / 69-86 Intake manifold bolt pattern
7 bolt hole exhaust mounting
Perimeter valve cover mounting holes
CH350AA Chevrolet 350 5.7 1955-86 Universal
Intake runner 178CC
Combustion Chamber 76CC
With Heat Riser / 69-86 Intake manifold bolt pattern
7 bolt hole exhaust mounting
Perimeter valve cover holes
ASSEMBLED
CH350H Chevrolet 350 5.7 1969-1986 Replaces casting number:
083, 191, 193, 217, 810,
Intake runner 176CC
Combustion Chamber 64CC Vortec chamber
With Heat Riser / 69-86 Intake manifold bolt pattern
Perimeter valve cover holes
Recommended to be replaced in pairs.
CH350HA Chevrolet 350 5.7 1969-1986 Replaces casting number:
083, 191, 193, 217, 810,
Intake runner 176CC
Combustion Chamber 64CC Vortec chamber
With Heat Riser / 69-86 Intake manifold bolt pattern
Perimeter valve cover holes
Recommended to be replaced in pairs.
ASSEMBLED
CH350G Chevrolet 350 5.7 1987-1995 Replaces casting number:
083, 191, 193, 217, 810,
Intake runner 176CC
Combustion Chamber 64CC Vortec chamber
With Heat Riser / 87 95 Intake manifold bolt pattern
Center bolt down valve cover holes
Recommended to be replaced in pairs.
CH350GA Chevrolet 350 5.7 1987-1995 Replaces casting number:
083, 191, 193, 217, 810,
Intake runner 176CC
Combustion Chamber 64CC Vortec chamber
With Heat Riser / 87 95 Intake manifold bolt pattern
Center bolt down valve cover holes
Recommended to be replaced in pairs.
ASSEMBLED
CH350C Chevrolet 350 5.7 1996-2006 Replaces casting number 12558062, 10239906,
Intake runner 170CC
Combustion Chamber 64CC
CH350CA Chevrolet 350 5.7 1996-2006 Replaces casting number 12558062, 10239906,
Intake runner 170CC
Combustion Chamber 64CC
ASSEMBLED
CH350I Chevrolet 350 5.7 PERFORMANCE IMCA SANCTIONED SPORT MOD HEAD
Intake runner 178CC
Combustion Chamber 76CC
69-86 Intake manifold bolt pattern
7 bolt hole exhaust mounting
Perimeter valve cover holes
With Heat Riser

** excludes performance product. See Warranty Page for complete details


Articles on EQ Cylinder Heads

Vortec Small Block Build – Popular Hot Rodding Magazine 

Small-Block Engine Build – Son Of Sledgehammer

Budget Engine Build – Popular Hot Rodding Magazine

Images of EQ Cylinder Heads

View Image of CH305B
View Image of CH350C
View Image of CH350G
View Image of CH350H


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EQ is Track Proven in IMCA Competition

EQ is a general sponsor of the International Motor Contest Association (IMCA) and the title sponsor of the IMCA Wild West Modified Tour. EQ cylinder heads have grown both in acceptance and usage with over 400 racers using EQ heads in multiple IMCA divisions.

imca-1

Whether you are a race team or a professional engine builder, EQ is the approved supplier for the IMCA Sport Modified and Hobby Stock Cylinder Head. Part # EQ-CH350I is a direct stock replacement for the Chevy 350 cylinder head with a 76cc combustion chamber, 1.94 intake valves and 1.50 exhaust valves.

  • Thicker decks for greater strength
  • CNC machined guides and seats
  • Superior port finish for increased flow
  • 3-angle valve finish
  • Machined integral guides
  • Hardened exhaust seats
  • Redesigned water flow for greater thermal conductivity
  • Each head serial numbered, with an IMCA logo branded on it, verified by IMCA

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