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HOLLEY EFI TERMINATOR STEALTH 2X4 MAIN HARNESS Part # 558-121

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HOLLEY EFI

TERMINATOR STEALTH 2X4 MAIN HARNESS

Part # 558-121
Introducing 2×4 Terminator Stealth EFI upgrade components. The wait is over. These upgrade components allow you to use your current Terminator Stealth EFI throttle body, install a new main harness, and slave throttle body, and you are finished. This upgrade is also perfect for anyone wanting to convert their 2×4 supercharged combo over to Electronic Fuel Injection!

Features:

  • 2×4 Side Mount Stealth Throttle Bodies – Provide the great looks of a classic Holley 4150 Carburetor, without any of the hassles
  • Multiple Color options allows for any Terminator Stealth EFI system to be upgraded to a 2×4
  • Plug and Play Main Harness provides a clean finished appearance and allows for a quick install!
  • Laptop Tuning is Required with this upgrade, we recommend taking your vehicle to a certified Holley EFI Tuner/Installer
Brand Holley EFI
Emission Code 3
Harness Type Main
Product Type Terminator Stealth 2×4
UPC 090127009239
Part Number 558-121
Weight 2.85 lbs
Dimensions 12.4 × 3.8 × 12.4 in

Brand

Holley EFI

Holley is quickly becoming The New Standard In EFI! Holley’s HP ECU is standard equipment on the 2013/2014 Chevrolet COPO Camaro and Holley’s EFI throttle body powers every NASCAR Sprint Cup Series™ team. Top racers are making the switch to Holley EFI every day. Racers like Tom Bailey who set three new records and took the overall event win on the 2013 Hot Rod Magazine Drag Week and John Scali who used it to win the 2013 JEGS All-Star race. But that’s not all. The world’s best hot rod builders and tuners are making the switch to Holley EFI. Builders like Dave Lane who used Holley EFI to power the 2013 Goodguys Hot Rod of the Year and tuners like Steve Morris who use it to build some of the baddest forced induction beasts on the planet. It’s the easiest, most refined, feature-rich system that money can buy. But, don’t take our word for it, see what the best are saying about Holley EFI!

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