World Products S/R Street Replacement Cast Iron Chev SB Head
Designed to replace old stock worn out heads at a very affordable price. They feature hardened exhaust seats, extra thick decks, machined valve cover rails (eliminates leaks), and come with screw-in rocker studs. Accepts all factory accessories.
Assemblies include 1.940"/1.500" premium valves, springs, steel retainers, locks, seals and screw-in studs. Assemblies are fully assembled and ready to bolt on.
Part Type: Cylinder Head
Application: S/R Chevrolet Small Block
Cylinder Head Material: Cast Iron
Bare or Assembled: Assembled (by Competiton Products)
Combustion Chamber Size: 58cc
CNC Machined Combustion Chambers: No
Intake Valve Angle: 23
Exhaust Valve Angle: 23
Intake Port Volume: 170cc
CNC Machined Intake Port: No
Intake Port Flow: cfm @ Lift / 28"
Intake Port Location: Standard
Intake Port Shape: Rectangular
Intake Port Dimensions: 1.940" x 1.170"
Suggested Intake Gaskets: Fel-Pro 1204, 1256 or Equivalent
Exhaust Port Volume: 65cc
CNC Machined Exhaust Port: No
Exhaust Port Flow: cfm @ . Lift/ 28"
Exhaust Port Location: Standard
Exhaust Port Shape: Square
Exhaust Port Dimensions: 1.345" x 1.370"
Suggested Exhaust Gaskets:
Spark Plug Style: Straight
Suggested Spark Plug: .460" reach, 5/8" hex plug
Valve Guides: Yes
Valve Guide Spacing: 1.900" (Intake: Stock Location / Exhaust is moved .040")
Valve Stem Diameter: 11/32" (.3415")
Valve Seats: Yes
Valve Job: Multi-Angle
Intake Valve Diameter: 1.940"
Intake Valve Included: Yes
Exhaust Valve Diameter: 1.500"
Exhaust Valve Included: Yes
Suggested Valve Length: 4.910" (Standard)
Valve Spring Pockets:
Valve Springs Included: Yes, 1.250" Single with Damper
Valve Spring Application: 120lbs Seat, 300lbs. Open, .510" Max Lift
Valve Springs Retainers Included: Yes
Valve Locks Included: Yes (7 Degree)
Valve Seals Included: Yes (Umbrella)
Rocker Studs Included: Yes (3/8")
Guide Plates Included: No
Valve Cover Mounting Style: Center Bolt and Perimeter
Steam Holes Drilled: No
Heat Crossover: Yes
Suggested Head Bolts: ARP 134-3601 or Equivalent
Suggested Head Studs: ARP 134-4001 or Equivalent
Suggested Stud Girdle:
Head Bolt Torque with Oil: 75 ft./lbs.
Rocker Stud Torque with Oil: 50 ft./lbs.
Intake Bolt Torque with Oil:
Manufacturer: World Products
Manufacturer's Part Number: 042650 Assembled by Competition Products
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Pair