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Holley EFI

Holley LS Hi-Ram EFI Manifold- Black GM LS1/LS2/LS6 PART#300-125BK

Holley LS Hi-Ram EFI Manifold- Black GM LS1/LS2/LS6 PART#300-125BK

Regular price $1,049.95 USD
Regular price $1,136.00 USD Sale price $1,049.95 USD
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The Holley GM LS7 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 LS7 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.


  • Standalone digital dashes for installation in most any vehicle ‚Äì no ECU or fuel injection required.o As easy to install as traditional gauges!
  • Two models available:
  • 6.86‚Äù version is big on features, but small on size for installation almost anywhere!
  • 12.3‚Äù version is for the hard-core enthusiast who wants the ultimate display device!
  • High resolution, state-of-the-art, multi-gauge touch-screen display with fully configurable layouts:
  • Full color, capacitive touch screen with auto dimming offers crystal clear data at your fingertips ‚Äì day or night ‚Äì no stylus needed
  • Quickly swipe between multiple active screens (tune, warm-up, race, drive, etc.)
  • Virtual switch panel eliminates the need for external toggle switches
  • 16 default backgrounds skins pre-loaded with unlimited options for importing custom layouts
  • Built-in GPS with speed, odometer and trip odometer function (external antenna included)
  • Integrated 10-LED programmable shift light w/ 4-LED warning indicators for other sensor inputs. (6.86‚Äù dash only)
  • Rendered analog (dials / needles) and digital gauge styles available
  • Integrated datalogger
  • Rugged, water resistant case is constructed of cast aluminum for long life and durability
  • Plug and play features are pre-configured in the harness and include dash layouts / screens for::
  • Oil and fuel pressure, coolant and air temp (utilizes plug and play Holley sensors, not included)
  • Turn signals
  • High beam
  • Fuel level
  • Engine vacuum / boost
  • Additional input and output functionality:
  • 13 multi-configurable inputs
  • 4 ground switched outputs
  • Four speed channels (two dedicated) for RPM, driveshaft speed, or any other Hall effect speed input
  • User definable channel alarms and warnings
  • Communications / Harness:
  • 4 Pin Wiring Harness contains Power, Ground and CANbus connections
  • Holley EFI CANbus connection for expanded capability with Holley EFI systems
  • Expandable storage via USB
  • Integrated Datalogger:
  • Internal Log Memory ‚Äì 1 GB (expandable up to 32GB with addition of micro-SD card)
  • External Logging to USB Flash Drive is also available for easy file management
  • On-screen datalog playback allows you to review vital run information right on the dash
  • Full analysis via laptop is available. Simply download the file to a USB drive and view with the free datalog viewer at
  • Flexible mounting options: Surface or flush mounting, with high quality hardware included
  • Simple setup and programming: USB Keyboard and Mouse functionality makes it quick and easy to setup new layouts
  • Fully Upgradeable:
  • Upgradable with future software enhancements
  • Can easily be converted for use with Holley EFI to monitor up to 238 real-time values such as RPM/TPS/Boost
  • Compatible with Holley EFI Plug and Play Programmable Shift Light - Part Number 553-107
  • What‚Äôs Included:
  • Both dash versions include harness / cables, mounting hardware, USB memory stick and CAN terminator
  • GPS Antenna
  • Sensors not included
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