Holley Sniper Stealth 4500 EFI Systems

The same Sniper Stealth 4500 EFI systems that can support 200 MPH dragsters can fuel your 800+ horsepower Pro Street car: new patent-pending Sniper Stealth 4500 EFI systems from Holley support up to 1,500 horsepower naturally aspirated—up to 1,250 horsepower on forced-induction applications—or anything with a 4500 flange that needs big power. They’re designed specifically for upgrading drag race and high-performance street vehicles to EFI, and you don’t have to be a computer genius or own a laptop to use them.


  • Fully compatible with draw-through and blow-through forced-induction applications.
  • Integrated ignition timing control and a programmable launch control.
  • -8AN fuel inlets.
  • Gen 3 Ultra Dominator–style four-bolt air cleaner flange.
  • 12” throttle plates flow 1,440 CFM for larger cubic-inch engines.
  • Integrated single-stage wet or dry progressive nitrous controller.
  • Three programmable 0-5V sensor inputs for oil/fuel/dome, nitrous pressure, etc.
  • Bosch LSU 4.9 wideband oxygen sensor for real-time fuel-map learning.
  • Three finishes: Polished (550-841), Black Ceramic (550-842), and Classic Gold (550-843).
  • And much more.
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