Big Block Chevrolet Merlin Cylinder Heads by World Products

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Big Block Chevrolet Merlin Cylinder Heads is listed here

• Automotive » Parts & Accessories » Car & Truck Parts » Engines & Components » Cylinder Heads & Parts

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[View page 1] merlin oval port the high velocity head for great bottom-end and mid-range torque machined surfaces for superior sealing exhaust port head bolt bosses raised 1 to unrestrict air flow complete assemblies equipped with manley stainless steel valves accepts all chevy mk iv valve train components accessories exclusive right castŪ technology assures optimum port accuracy oval-shaped intake ports provide excellent velocity technical specifications material high density cast iron valve seats integral intake hardened steel exhaust valve guides integral cast iron valve spring seats machined for 1.550 springs valve size 2.300 x 1.880 rocker arm studs 7/16 shank screw-in style with hex shoulder furnished with assembly exhaust flange stock port location includes accessory bolt holes included in base assembly manley racemaster 1 -2 models 1-pc forged stainless steel valves with swirl-polished heads ring band style 1 -2 models valve seals 1.550 1 -2 models or valve springs manley 7° ch

[View page 2] merlin iii rectangular accepts all chevy mk iv valve train components accessories machined surfaces for superior sealing complete assemblies equipped with manley stainless steel valves improved flow for high horsepower engines true d-shaped exhaust ports assure correct installations exhaust port head bolt bosses raised 1 to unrestrict air flow exclusive right castŪ technology assures optimum port accuracy technical specifications when larger displacement engines 454 plus cubic inches require additional flow choose merlin rectangular port cylinder heads with right castŪ 320cc and 345cc intake runners you can expect solid gains in air/fuel mixture combustion charges these heads will really respond to higher compression ratios and are ideally suited for hot street/strip cars the larger heads with 345cc intake ports are used successfully on merlin crate motors with up to 632 cubic inches displacement and can support nearly 800 hp in box stock mode material high density cast iron valve se

[View page 3] merlin iii merlin iii aluminum heads for maximum performance this is the cylinder head that highly respected drag racers have employed to win nhra and ihra national event titles.they are a true high performance head capable of supporting in excess of 800 horsepower right out of the box.they boast impressive flow numbers for an out of the box head with as cast ports take your pick between 310cc and 350cc intake runners the 119cc combustion chambers and ports are replicas of proven cnc-ported designs to provide optimum combustion efficiency the assemblies come set up for either hydraulic lifter solid or hydraulic roller lifters or mechanical roller lifters they vary in valve spring and valve specs merlin iii heads are also available bare technical specifications material 355-t6 high density aluminum alloy valve seats steel intake hardened steel exhaust valve guides bronze valve spring seats machined for 1.640 springs valve size 2.300 x 1.880 rocker arm studs 7/16 screw-in style

[View page 4] merlin x new 16° design gives pro stock-like flow numbers at sportsman prices note entire head has .300 wall thickness which facilitates generous porting out of the box flow numbers are excellent but there s plenty material for the serious performance enthusiast to dig into this all-new design from world s engineering team combines flow characteristics common to expensive race-only heads with exotic splayed valve setups while allowing use of popular chevy mark iv style valve train components as well as standard intake systems this has been accomplished through rolling the head to a 16° valve angle designing highly efficient intake and exhaust ports and using a special 80cc combustion chamber.you ll probably need to get a set of pistons that take advantage of the chamber design but other than that you can use most everything from a standard big block chevy and when you add up the performance potential versus total cash outlay it s clearly the hot set up for sportsman racers tec