Page 106 of 2008 Performance Parts by Ford Racing Performance Parts

cylinder heads ford racing sportsman short track cast iron cylinder heads m-6049-n351 bare head 64 cc chamber · for use in nascar late model stock i.m.c.a d.i.r.t and most other stock car sanctioning groups on 351w engines · much improved air flow over previous e351 heads · developed by ford racing with the help of larry lackey and robert yates of robert yates racing · machined for 2.02 intake and 1.60 exhaust valve diameters · intake and exhaust valves have been moved .070 to unshroud the intake valve · valve angle changed from 20° to 10° to further improve air flow · intake port volume 195 cc exhaust port volume 78 cc nominal · accepts stud girdle m-6569-c351 · thick deck and reinforced structure for improved sealing increased section thickness in critical areas and webbed rocker bosses for improved strength designed for stud mount rocker arms compatible with stock and ford racing intakes · these heads use .708 reach tapered seat spark plugs depending on application installation notes · requires m-6564-f351/j351 roller rocker arms with offset intake valve pushrod cup · unique header flange required · must use head bolt kit m-6065-c351 to install cylinder heads parts to assemble m-6049-n351 m-6566-d351 pushrod guideplate pkg of 8 m-6527-c311 rocker arm studs pkg of 16 m-6505-a351 high-flow stainless steel exhaust valve m-6507-a351 high-flow stainless m-6514-a50 steel intake valve retainers pkg of 16 high-port head m-6049-sc1 · · · · · · · · · · · · · unfinished combustion chambers typical finished volumes range from 40 cc to 70 cc raised intake and exhaust runners for better airflow and greater power fits 302 and 351 ford racing blocks used for drag sprint car and circle track racing intake and exhaust runner raised .400 over yates c3 head for better flow characteristics intake valves up to 2.180 diameter 5.685 long exhaust valves up to 1.625 diameter 5.565 long redesigned integral rocker pad for greater stiffness uses m-9424-w352 intake manifold with 9.200 deck block uses motorcraft ags-series spark plugs cylinder head comes semi-finished machining does not include valve seat bores must be ported bronze guides and valve seats included high-port nascar head m-6049-d3 m-6049-d35 without seats guides or pushrod holes · · · · · · · · · · · fits 5.0l and 5.8l ford racing blocks raised intake and exhaust ports used primarily in nascar and arca racing intake and exhaust runners raised .400 over yates c3 head capable of 400 cfm intake 267 cfm exhaust accepts intake valves up to 2.180 diameter exhaust valves up to 1.625 diameter integral rocker pad for greater stiffness cylinder head comes semi-finished combustion chamber and ports unfinished bronze guides and valve seat inserts included not installed intake manifold mounting bolt holes 90° to mounting flange use with m-9424-d451 or d452 intake manifold 104 techline 800 ford788 not legal for sale or use on pollution-controlled motor vehicles direct replacement part see pages 2-8 for important safety emissions and warranty information.

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