Holley EFI 550-501 HP EFI Universal MPI Retrofit Kits

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US$1,999.98
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US$1,999.98
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Free shipping Free 30-day returns

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Management number 254794274 Release Date 2026/11/07 List Price US$1,999.98 Model Number 254794274
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HP EFI Universal MPI Retrofit Kit, 4500™ carburetor style intake manifolds;<br><br>Do you have a Mopar, Ford or other type engine you want to install multi-port fuel injection on? No, problem, the Holley HP universal retrofit EFI kits are designed to be used with any V-8 intake manifold. The kit comes with injector bungs and un-machined fuel rails so you can modify to fit any single plane 4bbl intake manifold. The HP universal retrofit kits also come with the necessary wiring, ECU, sensors and throttle body. Just select the fuel pump and injectors of choice and you are off and running.;

  • NEW V2 SOFTWARE FEATURES
  • Quick Start ignition and fueling strategy for LS x Engines
  • Data Logger. Scalable axes, Smoothing, Multiple graph view ability, Pre-defined notes fields and many more
  • Strip Chart Real-Time Data Viewer
  • Integrated Boost Control - Boost vs Time, Boost vs Gear (Time or RPM), Boost vs RPM, Boost vs Speed, Launch control. Boost launch builder, Over-boost safeties, Boost scramble
  • Traction Control - Power reduction via timing, nitrous percentage or boost (Requires Davis Technologies Holley Module)
  • Quick Start fueling for all engines
  • Option for VE based fueling strategy
  • Fuel Map and Learn Function Smoothing
  • Configurable User Password Protection
  • Fully Configurable lap top Gauge Panel
  • FEATURES
  • Optional 5.7 inch full-color touchscreen LCD allows easy on-the-fly tuning, data-logging or can be used as an easy to see graphical gauge panel
  • Eight sequentially driven 8:2 peak and hold injector drivers, capable of driving up to 16 low or high impedance injectors as a standard feature. Multiple staged injector strategies
  • Eight channel Distributorless Ignition (DIS)outputs capable of directly driving Smart ignition coils or Holley DIS coils. Will drive 2 wire coils with the addition of PN 554-112 high current coil driver module
  • Plug and Play control of factory GM 24x and 58x LSx engines
  • Integrated single channel wide band oxygen sensor control. Works with NTK or Bosch sensors
  • Internal data-logging standard with a huge 2GB of memory
  • 4 Stage progressive nitrous control
  • Turbo boost control
Compatible cars Mopar, Ford
Vehicle make Mopar
Fuel injection accessory & part type MPI Retrofit Kits
Brand Holley EFI
Automotive parts division Performance
Vehicle fitment type Specific
Items included injector bungs and un-machined fuel rails, wiring, ECU, sensors and throttle body
Accessories injector bungs and un-machined fuel rails, wiring, ECU, sensors and throttle body
Features Powered
Model 550-501
Weight 22.35 lb
Has written warranty No
Vehicle type Car
Multipack quantity 1

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