Offenhauser 360 Degree High Rise Intake #5764 for B Engine

RustyRatRod said

It is a single plane, but the way it is designed, it essentially has a huge plenum, which brings back a lot of streetability. So it sorta has the best of both worlds. Extended RPM use of a single plane and good streetability of a dual plane. Similar to the old Holley Street Dominator.

Click to expand...

Correct ^^

The Offenhauser 360* 'Equa-Flow' High Rise is a good older Aluminum Intake.

The castings are of high-quality, and the units are heavier than the current
{more porous castings}.

It looks like a Dual-Plane in appearance, but the Intake has an 'open plenum'
and works off the Single-Plane profile.

And, the 'Center-Divider' does provide for more low-end Torque and mid-range Power.

It still is a very good Street Intake Manifold.

They work surprisingly well, even with a 'stock' Carter {630 CFM} AVS Carburetor.