Page 2 of Small Block Chevrolet SR, SR Torquer, & Motown Cylinder Heads by World Products

s/r torquer equipped with manley streetflo stainless steel valves accepts both perimeter and center bolt covers our lowest priced high performance small block chevy 2.02 cylinder heads screw-in rocker arm studs leak-free fully machined valve cover rails stock port locations for true bolt-on installations universal end pads accept all early and late model accessories exclusive right castŪ technology assures optimum port accuracy important note world s/r torquer cylinder heads are accepted as stock replacements by most oval tracks and sanctioning bodies an improved replacement for the factory chevrolet 327-350-400 cylinder heads world s exclusive s/r torquer series features 170cc intake runners and can provide up to a 30 horsepower 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 exhaust 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-on applications they are designed to use 2.020 intake and 1.600 exhaust valves and work well in engines from 302 to 400 c.i.d technical specifications material high density cast iron valve seats integral intake hardened steel exhaust valve size 2.020 x 1.600 rocker arm studs 3/8 shank screw-in style with hex shoulder furnished accessory flange stock locations 7-bolt universal pattern included in assembly manley street flo stainless steel 1-piece forged valves with swirl-polished heads ring and band valve seals valve springs manley 7° chrome moly retainers and keepers recommended installation items head gaskets fel-pro #1003 265-350 or equivalent pushrods 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 170cc intake runners provide 30 hp over most oem castings 76cc 67cc and 58cc oem-style combustion chambers available small block chevrolet s/r torquer cylinder heads part 042660 042660-1 042670 042670-1 042770 042770-1 application bare head hydraulic cam bare head hydraulic cam bare head hydraulic cam description street cast iron street cast iron street cast iron street cast iron street cast iron street cast iron valve dimensions 2.02 x 1.600 11/32 2.02 x 1.600 11/32 2.02 x 1.600 11/32 2.02 x 1.600 11/32 2.02 x 1.600 11/32 2.02 x 1.600 11/32 spring specs 1.250 single 100 seat 1.250 single 100 seat 1.250 single 100 seat max lift .560 .560 .560 chamber 67cc 67cc 76cc 76cc 76cc 76cc small block chevrolet s/r torquer 1987 up intake cylinder heads 18 rev 2/07 cylinder heads

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