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 our system. The plenum tops are constructed of cast aluminum.

Features:
  • Modular Design w/ Removable Top
  • A-B Height: 12.10” (w/ Carb Style Top - 2 x 4150 or 2 x 4500) – See Drawing
  • Height at Plenum Flange: 9.44”
  • O-Ring Seals for Plenum Top
  • More From This Category

    MSD Spark Plug Wires, Super Conductor, Spiral Core, 8.5mm, Red, HEI-Style, Stock Boots, For Honda , Set

    MSD Spark Plug Wires, Super Conductor, Spiral Core, 8.5mm, Red, HEI-Style, Stock Boots, For Honda , Set

    $391.33

    DiabloSport Trinity, 2 50 State Ford

    DiabloSport Trinity, 2 50 State Ford

    $1,298.42