Fits Holley Hi-Ram Manifolds - 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 flat black powder coating matches 300-653BK and 300-306BK. It will NOT match the following bases exactly as they are ceramic black (semi-gloss): 300-113BK, 300-226BK, 300-229BK, 300-243BK.
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