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4V CAST IRON FACTORY HEADS
- Must be hand finished
- Intake valve 2.19 exhaust valve 1.710
- Intake tongues are fitted
- 259cc intake port volume
- 68cc chamber volume (closed chamber)
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Valve lift
|
.100”
|
.200”
|
.300”
|
.400”
|
.500”
|
.550”
|
.600”
|
.650”
|
.700”
|
.750”
|
|
Intake c.f.m.
|
71
|
144
|
212
|
256
|
289
|
304
|
318
|
330
|
342
|
347
|
|
E xhaust c.f.m
|
58
|
109
|
153
|
180
|
207
|
215
|
218
|
220
|
225
|
225
|
|
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