Inliners International Forums General Discussion Hi Performance 3 x 2 MAN A FRE Chevy intake manifold on ebay

IIRC the sales pitch was the very short distance from the throttle plates to the intake valve made response excellent and (claimed) better mixture distribution.
They sort of ignored the fact that one 2 bl. served both the #5 & 7 cylinders, which fire only 90° apart, so are worse than conventional manifolds in that respect.