Product details
Fits Holley Hi-Ram Manifolds - Holley has launched new black ceramic-coated plenum tops to match our Hi-Ram manifold bases!
They are available in the dual 4150 throttle body pattern or in a full blank top so that you can design your system. The plenum tops are constructed of cast aluminum.
*This semi-gloss ceramic coating matches 300-113BK, 300-226BK, 300-229BK, and 300-243BK base part numbers.
