Victor Jr. 23? Cylinder Head for Small-Block Chevy (220cc)

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Edelbrock Part # 61255 Victor Jr. 23deg 220 cylinder head is designed for small-block Chevy Its 64cc combustion chamber yields around 10:1 compression ratio in a typical flat-top application and about 12.5:1 when used with some of the most common 12cc dome pistons. One of the key features of the Victor Jr. 23deg 220 cylinder head is the CNC machined chambers and bowls, which result in consistency and improved performance. They also feature angled spark plug holes and maintain the stock 23deg valve angle as well as the intake flange bolt pattern for use with 1986 and earlier intake manifolds. All of this allows this cylinder head to deliver 530-580 hp potential right-out-of-the-box, making them ideal for a budget minded engine build desiring a high quality cylinder head that still uses a stud and guide plate rocker system. Cylinder Head Specifications: ? Finish: Satin ? Designed for use with Hydraulic Roller camshafts ? Combustion chamber volume: 64cc ? Intake runner volume: 220cc ? Exhaust runner volume: 85cc ? Intake valve diameter: 2.10" ? Exhaust valve diameter: 1.60" ? Valve stem diameter: 5/16? ? Valve guides: Manganese bronze ? Deck thickness: 11/16? ? Valve spring diameter: 1.55" ? Valve spring maximum lift: .630" ? Rocker stud: 7/16" ? Guide plate: Hardened steel ? Pushrod diameter: 5/16" ? Valve angle: 23deg ? Exhaust port location: Raised .300? ? Spark plug fitment: 14mm x .750 reach, gasket seat

Documents & Installation Notes


Availability Available
Application Application Specific
UPC 00085347612550
Series Victor Jr.
Quantity Sold Individually
Availability Note Available to Order
Warranty 12 Months
Horsepower 450-600 HP
Ech Ival Dia 2.10 in
Camshaft Type Hydraulic Roller
Guide Plate Material Hardened Steel
Seat Angle Exhaust 45 deg/Intake 45 deg
Emissions Code
Hazardous Materials Warning WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit
Installation Notes
  • Match with Edelbrock head gasket sets or use Fel-Pro intake gasket #1206 and Fel-Pro exhaust gasket #1405. Requires hardened pushrods. Use Head Bolt Kits for easy installation. These heads require the use of a 14mm x ¾
CNC Ported Yes
Combustion Chamber Volume 64 cc
Deck Thickness 0.6875 in
Exhaust Valve Diameter 1.60 in
Guide Plates Included Yes
Intake Runner Volume 220 cc
Material Aluminum
Push Rod Diameter (Suggested) 0.6875 in
Rocker Stud Diameter 0.4375 in
Valve Angle 23 deg
Valve Spring Diameter 1.55 in
Valve Spring Maximum Lift 0.630 in
Valve Stem Diameter 0.3125 in