Manufacturer's Part Number:
Intake Manifolds, Carbureted
Offenhauser Dual Port Intake Manifolds
Summit Racing Part Number:
Intake Section Included:
Engine Block Style:
Stock/OEM standard deck
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Offenhauser Dual Port intake manifolds feature completely separate runner systems for the primaries and secondaries. At low-load, the primaries feed the fuel-air charge through the smaller bottom passages at near sonic speed, improving power and efficiency. When the secondaries open, their charge goes through the bigger, cooler upper passages. Then, in turn, it is rammed into the cylinders when it encounters the high-velocity mix from the primaries. The results are better fuel economy and a 15-30 percent power increase across the whole rpm range.
Result 1 of 1
4-barrel square bore
Cylinder Head Style (application):
Some vehicles, such as Bronco II and Ranger, must use 1983 or earlier stock distributor with vacuum advance, or equivalent. Manifolds use 3-bolt Ford water neck.
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