Holley EFI Hi-Ram Manifold, LS1/LS2/LS6 Cathedral Port EFI for 1 x 105MM Throttle Body

Regular price $1,097.95 Save $-1,097.95
99 in stock
The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high flowing LS1/LS2/LS6 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. Aggressive, bold, race-bred styling will make bad intentions clear for drag race, muscle car, marine, off-road, sandrails, pulling trucks, track, street-rod applications and more!

  • The base is designed to be modular in configuration to accept a wide range of carbureted and EFI tops and to be attractive to builders and fabricators as the foundation for custom induction systems.
  • Runner length and the tapered cross-section designed to perform well for a wide range of engine configurations
  • EFI fuel rails are machined for -8AN O-ring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi-Ram kits.
  • Cast aluminum construction.
  • Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range, max power at 7000-8000+RPM.

  • Base Plenum Top Mounting Flange Height - 8.42” to the lifter valley cover flange on engine block.
  • Total Height with 92/102mm EFI Plenum Top - 12.32” to the lifter valley cover flange on engine block.
  • Port Size - 2.49” Height x 1.21” Wide
  • Mounting Flange Gasket Type - Standard LS3 Molded O-Ring
  • Plenum Top Gasket Type - 3/32” Round O-ring Cord
  • Throttle Body Flange Location, with 92/102mm EFI Plenum Top : Height - 8.42” (from engine block lifter valley cover flange), Longitudinal Location - 3.84” (forward from engine block front flange), Angle - 25 deg. (down from vertical)
  • Runner Length - 6.58”, As-Cast Runner Cross-Sectional Area - Tapered 4.25 in² to 2.53 in²"

Installation Notes:
These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration. Top can be mounted forward or backward.