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World Products S/R Torquer Cast Iron Chev SB Head
Features 170cc intake runners and can provide up to 30 HP increase over OEM castings. Note: accepted by many racing associations as "stock". Designed to accept early and late model accessories including dual valve cover bolt patterns. Includes 3/8" screw-in studs.
Assembled kits include 2.020"/1.600" stainless steel valves, HP springs, steel retainers, locks, and seals.
Part Type: Cylinder Head
Application: S/R Torquer Chevrolet Small Block
Cylinder Head Material: Cast Iron
Bare or Assembled: Assembled Kit (by Competition Products)
Combustion Chamber Size: 67cc
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: 1.340" 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: 2.020"
Intake Valve Included: Yes
Exhaust Valve Diameter: 1.600"
Exhaust Valve Included: Yes
Suggested Valve Length: 4.910" (Standard)
Valve Spring Pockets:
Valve Springs Included: Yes, 1.265" Single with Damper
Valve Spring Application: 125lbs. Seat, 375lbs. Open, .600" 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: Yes
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: 45 ft./lbs.
Intake Bolt Torque with Oil:
Manufacturer: World Products
Manufacturer's Part Number: 042660 Assembled by Competition Products
Weight:
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Pair
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