Holley's Hi-Ram intake plenum top is offered in a black ceramic-coated finish to match Hi-Ram manifold bases, giving builders a blank-flange top for designing a custom throttle body or EFI setup.
Specifications:
- Manifold Type: Hi-Ram
- Construction: Cast Aluminum
- Finish: Black
- Product Type: Intake Manifold Top
- Height at Plenum Flange: 9.44"
- A-B Height (w/ Carb Style Top - 2 x 4150 or 2 x 4500): 12.10"
- Seal Type: O-Ring Seals for Plenum Top
- Design: Modular, Removable Top
- Part Number: 300-208BK-2
Fits Holley Hi-Ram manifold bases.
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
What does the 300-208BK-2 plenum top fit?
It fits Holley Hi-Ram intake manifold bases as a blank-flange plenum top, letting you build a custom throttle body or EFI configuration.
What finish does it come in?
A black ceramic-coated finish over cast aluminum construction, matching Holley's black Hi-Ram manifold bases.
Is this legal for street use?
No. This part is legal for Racing Use Only vehicles and cannot be installed on an emissions-controlled street vehicle.

