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Bare Head (64cc 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 degrees to 10 degrees to further improve air flow
Intake port volume 195cc, exhaust port volume 78cc 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 Motorcraft AF or AFS-series spark plugs depending on application
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Features
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
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