Page 5 of Small Block Chevrolet SR, SR Torquer, & Motown Cylinder Heads by World Products

motown 23° new small block chevy heads for street racing applications choose between versatile 215cc and high-flow 235cc screw-in rocker arm studs perimeter style valve cover attachment universal end pads accept all early and late model accessories leak-free fully machined valve cover rails available with 215cc and 235cc intake runners note must use .150 offset intake rocker arms exhaust ports raised .250 world products introduces two great new cylinder heads for small block chevy applications first is the motown 23° with 215cc intake runners this vortec-style head combines high velocity ports with a quick-burn style combustion chamber this is perfect head for serious street performance for larger displacement small blocks as well as highly modified engines world s new 235cc intake motown head is the answer with huge 2.100 intake and 1.625 exhaust valves coupled up with highly efficient port designs and right castŪ technology these heads flow incredibly well the screw-in rocker arm studs are installed at 23° the same angle as the valves this assures optimum valve train geometry throughout the rocker arm arc offset rocker arms are required in conjunction with longer-than-stock valves to maintain the correct geometry technical specifications material 355-t6 alloy high density aluminum valve seats siamese steel intake hardened steel exhaust valve guides bronze valve spring seats machined for 1.550 springs valve size 2.080 x 1.600 215cc and 2.100 x 1.625 235cc rocker arm studs screw-in style 23° angle same as valves included in assembly manley racemaster 1 2 models or severe duty 3 models 1-pc forged stainless steel valves with swirl-polished heads ring band 1 2 models or pc 3 models style seals 1.440 1 2 models or 1.550 3 models valve springs manley 7° 1 2 models or 10° 3 models chrome moly retainers keepers and pushrod guide plates as-cast combustion chambers utilize the latest high swirl technology high flowing 215cc and 235cc intake runners make hp motown 23° aluminum small block chevy cylinder heads 215cc and 235cc intake part 024015 024015-1 024015-2 024015-3 024020 024020-2 024020-3 description motown 23° alum 215cc motown 23° alum 215cc motown 23° alum 215cc motown 23° alum 215cc motown 23° alum 235cc motown 23° alum 235cc motown 23° alum 235cc cam type bare head hydraulic mech hyd solid roller bare head mech hyd solid roller plug angle angle angle angle angle angle angle valve type none manley race master manley race master manley severe duty none manley race master manley severe duty spring specs bare 1.250 single 100 seat 1.437 dual 125 seat 1.550 dual 200 seat bare 1.437 dual 125 seat 1.550 dual 200 seat max lift .560 .600 .700 .600 .700 chamber 64cc 64cc 64cc 64cc 64cc 64cc 64cc note motown 23° aluminum heads also available with 72cc chambers see website www.worldcastings.com for details cylinder heads rev 2/07 21

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