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Offenhauser Dual Port Intake Manifolds 6257DP

Offenhauser 6257DP - Offenhauser Dual Port Intake Manifolds

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Intake Manifold, Dual Port, Aluminum, Natural, Square Bore, AMC, 258, L6, Each

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Brand: Offenhauser
Manufacturer's Part Number: 6257DP
Summit Racing Part Number: OFY-6257DP

Intake Section Included: Complete
Engine Block Style: Stock/OEM standard deck
Carburetor Quantity: One
Intake Style: Dual plane
Intake Finish: Natural
Intake Material: Aluminum
EGR: No
Quantity: Sold individually.
Notes: Not for use with automatic transmission application.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.
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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.

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Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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