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

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Specs
Sold in Quantity:
Each
Finish:
Natural
Cylinder Head Style:
-
Spark Plug Style:
Straight
Port Style:
Square Port
Material Type:
Cast Iron
Combustion Chamber:
-
Intake Runners:
170cc
Intake Valve Diameter:
2.020
Exhaust Valve Diameter:
1.600
World S/R Small Block Chevy Cylinder Heads, Straight Plug, 2.02/1.60 Valves

Click image to enlarge

Details

Reviews (0)

Q & A (5)

What's in the Box

Info

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.

S/R Head Application Chart (GIF)

Item Details

Straight Plug, 2.02/1.60 Valves

Notes

  • Large intake & 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 & 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.

Specs

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

Customer Reviews

This product has no reviews.

Product Q&A

5 questions : 5 answers

1 answers

what are the degrees you are supposed to cut for the three angle valve job

gatorade
February 04, 2014

what are the degrees you are supposed to cut for the three angle valve job

Answers

February 04, 2014
EricM
There are many different combinations of angles that performance machine shops will use. For the angle that these are cut at you will need to contact World Products for that info. They do not publish the angles that these are cut at.
1 answers

Are these heads imca sport mod legal?

proracer11
Wichita, KS, USA
January 23, 2013

Are these heads imca sport mod legal?

Answers

January 24, 2013
Jason
Sorry, this World Products cylinder head is not legal in IMCA Northern or Southern Sport Mod. You must use a OEM head #126, 185, 336, 441, 445, 487, 487X, 493, 598, 624, 862, 882, 920, 993, 997 or the EQ mod head Speedway part #9154622. The only World product head legal in B mods is for a Ford application.
1 answers

what lift camshaft can i go up to with these heads?

mike
cumberland ri
September 29, 2011

what lift camshaft can i go up to with these heads?

Answers

September 30, 2011
Jason
If buying this head complete from Speedway, springs used will accept upto .550" lift.
1 answers

Do these heads have to be milled in order to run guide plates? Also states if bout complete through you guys can handle.550 cam lift my cam is comp cams .532/.555 will these valve springs handle it?

Kingpin
chilhowee,mo
June 29, 2015

Do these heads have to be milled in order to run guide plates? Also states if bout complete through you guys can handle.550 cam lift my cam is comp cams .532/.555 will these valve springs handle it?

Answers

June 29, 2015
Eric
Expert
No these heads so not need milled in order to run guide plates. The valve springs that are used with the complete assembled heads are part number 180671515. They are intended for hydraulic flat tappet camshafts with up to .550" lift. Your camshaft is on the top end of what they can handle. We would need to know exactly what cam you are using to be certain they will work correctly.
1 answers

What valve length do these heads require and the size of push rod to use

cody
okmulgee, ok
May 26, 2016

What valve length do these heads require and the size of push rod to use

Answers

May 27, 2016
Eric
Expert
We typically use stock length or .100" longer than stock valves with most valve springs. The valve length will be dictated by the installed height of your valve springs as well as the height of the retainers you are using. Pushrod length will need to be measured to get the proper length for your combination when the engine is assembled. I use pushrod length checker 28799721 to find the proper length.
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