1965-96 Ford Straight-6; 240-300 cid; Offenhauser Dual Port 360 Degree Intake Manifold; Square Bore, 4-Barrel

Offenhauser Dual Port intake manifolds feature completely separate runner systems for the primaries and secondaries for more power across the rpm range. At low-load, the primaries feed the air/fuel 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 entire rpm range. These manifolds are available in a variety of styles and options for many year/make and engine applications.

Carb size recommended for OF6019DP is from 390 CFM to 500 CFM. Use the Series C manifold, part# OF6227C for 500 CFM and larger.

• Fitment Note: This manifold accepts square bore, Holley, Carter AFB, Edelbrock style carburetors. It will NOT accept spread bore, Quadrajet type carburetors.