The Hi-Ram was essentially an EFI tunnel ram for LS applications. The designers at Holley saw fit to configure ... a pair of four-hole (4150-style) throttle bodies, a pair of 4150 carburetors ...

As a longtime soapbox-shouter of tunnel-ram greatness, David Freiburger is constantly peppered with questions about running a single four-barrel carb versus dual quads on the tunnel ram.

The original Holley Model 4150 carburetors were introduced over ... These could be used to make a tunnel ram much more street-able than is usually the case with conventional carburetors.

Holley came out with the first modular carburetor, the 4150, back in '57. Today, Holley still makes the 4150-heck it even makes hopped-up versions for everything from drag racing to rock crawling.

However, back then we ran it with two different intake combos: a Holley Street Dominator dual ... stacked the Anvil with an Edelbrock Street Tunnel ram, with longer, smaller ports than a full ...