The P/N 300-631 & 300-631BK Lo-Ram billet aluminum plenum tops are designed as part of the Holley LS Ultra Lo-Ram EFI intake manifold kits. It is commonly known billet is the best. The strength and rigidity of these components is impervious to cracking and further resists any vibration and harmonics. These 3D CNC machined pieces are cut from a solid block of billet and then anodized. Take your Ultra Lo-Ram to another lever with Holley billet components.

Features:
  • Machined billet construction
  • Clear/black anodized for long-term protection from elements and fuels
  • Works with all Ultra Lo-Ram bases (300-602, 300-602BK, 300-603, 300-603BK)
  • Holley Ultra Lo-Ram Plenum top can be custom machined for a standard “large” 6-1/8” x 3-1/8” burst panel (SFI approved burst panels, burst panel frame sets, and gaskets may be purchased from various manufacturers such as Allstar Performance or Specialty F
  • Modular Lo-Ram design allows user customization for your induction system
  • Flange seal o-ring cord and the mounting fasteners are included in the kit
  • Includes hardware
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