Small Block Chevy S/R Torquer Cast Iron Cylinder Head 170cc Intake Ports

Name: Small Block Chevy S/R Torquer Cast Iron Cylinder Head 170cc Intake Ports
Brand: WORLD PRODUCTS
SKU: 955-042670
Price: 652.16 USD
Availability: InStock

^$652¹⁶

Ships on Sep 14, 2026

Lowest Price Guarantee

Small Block Chevy 327-400ci S/R Torquer Cast Iron Cylinder Heads

170cc Intake Ports
76cc Combustion Chambers
Cut for 2.020'' Int/1.600'' Exh Valves
Bare Head, Sold Individually

*While Supplies Last*

170cc intake runner
Material: High density cast iron
Valve Seats: Integral intake,hardened steel exhaust
Valve Size: 2.020' x 1.600' (1.940' x 1.500' for S/R Torquer 305)
Rocker Arm Studs: 3/8' shank, screw-in style with hex shoulder furnished(complete assemblies only)
Accessory Flange: Stock locations, 7-bolt universal pattern
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Recommended Installation Items:
Head Gaskets: Fel-Pro #1003 (265-350) or equivalent.
Puhshrods: OEM can be used. Hardened not required
Spark Plugs: Accepts 14mm-5/8' .460' reach tapered seat (Accel 274 or 276, AC-Delco 43TS or 44TS, Champion #670 or #802) or equivalent
Intake Gasket: Fel-Pro #1204 or #1256 or equivalent
Exhaust Gasket: Fel-Pro #1404 or #1405 or equivalent

Bolt-On Up To 30HP!

An improved replacement for the factory Chevrolet 305-400ci cylinder head, World Products exclusive S/R Torquer series features 170cc intake runners and can provide up to a 30 HP increase over most OEM castings. Note, however, that these heads are accepted by many racing associations as ''stock'', and are 50-state emissions legal. S/R Torquer heads accept early and late model accessories. The valve seats are hardened to provide compatibility with unleaded gas.

The S/R Torquer heads are available in 67cc and 76cc versions for engines up to 1986 and 76cc for 1987-later applications. They are designed to use 2.020'' intake and 1.600'' exhaust valves, and work well in engines from 302 to 400ci. World's S/R Torquer 305 cylinder heads come with 58cc combustion chambers, and are ideally suited for use on 262-307ci small blocks.

Technical Specifications

Material: High density cast iron
Valve Seats: Integral intake, hardened steel exhaust
Valve Size: 2.020'' x 1.600''
Accessory Flange: Stock locations, 7-bolt universal pattern
Included In Assembly: Erson stainless steel, ring and band valve seals, valve springs, Erson 7° retainers and keepers.

Recommended Installation Items
Head Gaskets: Fel-Pro 375-1003 or equivalent
Pushrods: OEM can be used, hardened not required
Screw-in Studs: 3/8" or 7/16" with 7/16"-14 base thread
Pushrod Guidplates: These heads are not machined for guide plates. If desired Flat 5/16" Erson 601 or equivalent can be used after .125" is milled off the stud bosses and the push rod holes opened
Spark Plugs: Accepts 14mm-5/8'' .460'' reach tapered seat (Accel 274 or 276, AC-Delco 43TS or 44TS, or equivalent)
Intake Gasket: Fel-Pro 375-1204 or 375-1256 or equivalent
Exhaust Gasket: Fel-Pro 375-1404 or 375-1405 or equivalent