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.

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 Distributor, Pro-Billet Ready-To-Run, Male/HEI, Vacuum and Mechanical, Black, For Ford, For Mercury, 4.7L, 5.0L, Each

    MSD Distributor, Pro-Billet Ready-To-Run, Male/HEI, Vacuum and Mechanical, Black, For Ford, For Mercury, 4.7L, 5.0L, Each

    $1,619.10

    AEM Fitting, 3/8 in. NPT Fittings

    AEM Fitting, 3/8 in. NPT Fittings

    $417.33

    APR Tip Kit, Double Wall Exhaust Tips, 3.5in, Polished Diamond Black, Set of 2

    APR Tip Kit, Double Wall Exhaust Tips, 3.5in, Polished Diamond Black, Set of 2

    $407.84