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D3 Type Head Flow Graph

As this chart shows, the flow capability of the UPM D3 head is impressive. Peak figures of 434 and 283 for the intake and exhaust respectively are likely to set new standards for SB heads of any variety. Note the swirl curve which starts at about 0.450 lift. This may be a key factor toward faster burn rates.
A Super Head for Small-Block Fords

 As this chart shows, the flow capability of the UPM D3 head is impressive. Peak figures of 434 and 283 for the intake and exhaust respectively are likely to set new standards for SB heads of any variety. Note the swirl curve which starts at about 0.450 lift. This may be a key factor toward faster burn rates.  View Related Article

 

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