Offenhauser Dual-Port 360* Intake ~ 'Was It A Gimmick'

They hit the 'scene' in December 1970.

As per my old Offenhauser 'New Product Bulletin'

The smaller runners will provide for more air-speed, increasing velocity.
This will increase Fuel Economy for Daily Driving capabilities.

The Primary throttle bores feed 'straight' down into the 'smaller' Runners
which are located on the bottom plane of the Intake casting.

This creates a'Ram-Effect' as quick as the Speed of Sound. This means,
a faster and hotter Primary feed into the Cylinder Head Intake Ports.

The result is more efficiency at Low-End, and in the early Mid-Range intervals.

Higher velocity in the smaller but separate Primary Ports equals better response
and more Low-End Horsepower.

Damn, it sounded good.