World S/R Small Block Chevy Cylinder Heads, Straight Plug, 2.02/1.60 Valves

More performance and less expensive than rebuilding used heads. No more searching junkyards looking for cylinder heads for your motor.Looks like the smog head on the outside, but has racing head features like an extra-thick deck, screw-in rocker arm studs, and raised valve cover rails.

Use 14 mm-5/8", .460 reach, taper seat spark plugs.

Item Details

• Large intake and exhaust runners like double hump head
• Extra-thick decks and walls for improved reliability
• Hardened steel exhaust seats for unleaded gasoline
• Machined for 3/8" screw in studs (not included)
• Raised valve cover rails to eliminate oil leaks
• Accepts early style perimeter or late model center bolt valve covers
• Can be milled for large springs
• 50-State Emissions legal

Assembled Heads Add:

• Heavy Duty S.S. Valves
• Steel Retainers and Locks
• 1.25" Hi-Po Valve Springs
• 3 Angle Valve Job

Head Flow @ .500 Lift
220 intake, 151 exhaust (Super Flow 1050)
232 intake, 161 exhaust (Super Flow 600)
All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water.

• Large intake and exhaust runners like double hump head
• Extra-thick decks and walls for improved reliability
• Hardened steel exhaust seats for unleaded gasoline
• Machined for 3/8" screw in studs (not included)
• Raised valve cover rails to eliminate oil leaks
• Accepts early style perimeter or late model center bolt valve covers
• Can be milled for large springs
• 50-State Emissions legal

Assembled Heads Add:

• Heavy Duty S.S. Valves
• Steel Retainers and Locks
• 1.25" Hi-Po Valve Springs
• 3 Angle Valve Job

Head Flow @ .500 Lift
220 intake, 151 exhaust (Super Flow 1050)
232 intake, 161 exhaust (Super Flow 600)
All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water.

S/R Head Application Chart (GIF)

Installation Guide (PDF)

Casting ID Number: I-052, I-058
Material: High density cast iron
Valve Seats: Intake (integral), exhaust (hardened)
Valve Guides: Integral cast iron
Spring Seats: Machined for 1.560" and 1.250"
Valve Diameter: 11/32" stem
Rocker Arm Studs: Screw-in style
Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes)
Intake Runner: 170cc, standard port location
Exhaust Ports: 65cc, standard location
Spark Plug: 14mm 5/8" .460" reach tapered style
Valve Job: Multi-angle intake and radiused exhaust
Valve Cover Rail: Raised w/ perimeter and center bolt pattern
Valve Angle: Stock 23°
Accessory Bolt Holes: Stock