Holley Performance 300-261 Engine Intake Manifold

from 68 Bowtie

Installed this manifold on 406 sbc that had a dual plane with a throttle body EFI. Huge improvement! EFI systems are much easier to tune with single plane intake. Idle and low rpm response are not compromised because EFI does not rely on manifold vacuum.

from Soupership

the thermostat housing is located in the factory position on the holly manifold. this will be important if your using a set of valve covers with a cross over vent tubes. all other manifolds for an application like this have moved the housing all the way forward of the intake making it impossible ...

from 68 Bowtie

Installed this manifold on 406 sbc that had a dual plane with a throttle body EFI. Huge improvement! EFI systems are much easier to tune with single plane intake. Idle and low rpm response are not compromised because EFI does not rely on manifold vacuum.

from Soupership

the thermostat housing is located in the factory position on the holly manifold. this will be important if your using a set of valve covers with a cross over vent tubes. all other manifolds for an application like this have moved the housing all the way forward of the intake making it impossible ...