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EFI Systems

EFI Performance Tuning 

EFI performance tuning is a game-changer for anyone looking to squeeze every last ounce of efficiency and horsepower from their engine. Scram Speed offers a wide variety of tools for dialing in the perfect tune. Whether you’re just starting out or chasing tenths at the track, our EFI performance tuning products make setup and adjustment straightforward.

Looking for simplicity? The self-tuning Holley EFI system is a favorite among our clients for its plug-and-play ease. It’s ideal for builders who want results without constant fiddling. Our team is always on hand to help you select the right components to get your setup running flawlessly. Reach out to Scram Speed today for expert support and to take your EFI performance tuning to the next level.

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  • Scram Speed Sniper and Terminator X Stealth EFI 4150 Dual Feed Fuel Line Kit, high-performance fuel injection component with dual feed fuel lines and precision fittings.

    Scram Speed

    Sniper and Terminator X Stealth EFI 4150 Dual Feed Fuel Line Kit

    (1)

    The part that Holley forgot! ALSO FITS Terminator XP Stealth Kits!The Sniper Stealth EFI is a great system. It does a great job of converting a car to fuel injection while keeping that classic carburetor look. Unfortunately, Holley ships these systems...

    (1)

    $79.99
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  • Holley Performance Parts – EFI, Intakes, & More Holley EFI Main Power Harness -HP and Dominator EFI, automotive wiring harness with multiple connectors and insulated cables.

    Holley Performance Parts – EFI, Intakes, & More

    Holley EFI Main Power Harness -HP and Dominator EFI

    Main Power Harness for Avenger EFI, HP EFI, & Dominator EFI This is required if buying a separate Holley EFI Dominator or HP EFI ECU.    

    MSRP: $120.95
    $106.95
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  • Holley Performance Parts – EFI, Intakes, & More HOLLEY EFI DOMINATOR ECU ONLY, black vehicle management system ECU with branding

    Holley Performance Parts – EFI, Intakes, & More

    HOLLEY EFI DOMINATOR ECU ONLY

    Dominator¨ EFI Vehicle Management Systems are intended for all engine applications, from street to unlimited highÐend racing applications. Dominator¨ systems have nearly unlimited capabilities to control any power adder, input, or output you...

    MSRP: $2,699.95
    $2,399.95
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  • Holley Performance Parts – EFI, Intakes, & More Holley HP EFI HP ECU, black engine control unit with connection ports and branding label.

    Holley Performance Parts – EFI, Intakes, & More

    Holley HP EFI HP ECU

    Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI...

    MSRP: $2,306.95
    $1,999.95
    Add to Cart The item has been added
  • Holley Performance Parts – EFI, Intakes, & More Holley HP EFI Plug and Play ECU and Harness kit for GM LS2/LS3/LS7, includes NTK O2 sensor, electronic wiring harness, ECU unit, and installation accessories.

    Holley Performance Parts – EFI, Intakes, & More

    Holley HP EFI Plug and Play ECU and Harness kit for GM LS2/LS3/LS7 -NTK O2 sensor

    Looking for a alternative for your stock or built late model factory FORD EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as...

    MSRP: $3,341.95
    $2,969.95
    Add to Cart The item has been added
  • Holley Performance Parts – EFI, Intakes, & More HP ECU AND HARNESS, LS2/3/7, BOSCH INJ, automotive wiring and electronic engine control units for LS engines.

    Holley Performance Parts – EFI, Intakes, & More

    HP ECU AND HARNESS, LS2/3/7, BOSCH INJ

    Looking for a alternative for your stock or built late model factory FORD EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as...

    MSRP: $3,059.95
    $2,719.95
    Add to Cart The item has been added
  • Holley Performance Parts – EFI, Intakes, & More Holley EFI HP ECU AND HARNESS, Universal Ford V8 Multi-Point -NTK 02 Sensor, image shows an automotive engine control unit with wiring harnesses, sensors, and accessories for vehicle tuning and engine management.

    Holley Performance Parts – EFI, Intakes, & More

    Holley EFI HP ECU AND HARNESS, Universal Ford V8 Multi-Point -NTK 02 Sensor

    Looking for a alternative for your stock or built late model factory FORD EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as...

    MSRP: $3,228.95
    $2,869.95
    Add to Cart The item has been added
  • Holley Performance Parts – EFI, Intakes, & More Holley EFI HP ECU AND HARNESS, Universal Ford V8 Multi-Point, automotive wiring harness and electronic control unit with connectors and accessories.

    Holley Performance Parts – EFI, Intakes, & More

    Holley EFI HP ECU AND HARNESS, Universal Ford V8 Multi-Point

    Looking for a alternative for your stock or built late model factory FORD EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as...

    MSRP: $2,936.95
    $2,609.95
    Add to Cart The item has been added
  • Holley Performance Parts – EFI, Intakes, & More Holley EFI HP ECU and Unterminated Harness - NTK O2 Sensor, automotive wiring harness and components for engine control and tuning.

    Holley Performance Parts – EFI, Intakes, & More

    Holley EFI HP ECU and Unterminated Harness - NTK O2 Sensor

    Looking for a alternative for your stock or built late model factory FORD EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as...

    MSRP: $3,228.95
    $2,869.95
    Add to Cart The item has been added
  • Holley Performance Parts – EFI, Intakes, & More Holley EFI HP ECU AND HARNESS KIT - Universal Multi Point Fuel Injection, showing various wires, connectors, ECU unit, sensors, and installation hardware for vehicle engine management.

    Holley Performance Parts – EFI, Intakes, & More

    Holley EFI HP ECU AND HARNESS KIT - Universal Multi Point Fuel Injection

    Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI...

    MSRP: $2,936.95
    $2,609.95
    Add to Cart The item has been added
  • Holley Performance Parts – EFI, Intakes, & More Holley HP EFI Plug and Play ECU and Harness kit for GM LS2/3/7 NTK Sensor, automotive wiring harness and electronic control unit with various connectors and wires.

    Holley Performance Parts – EFI, Intakes, & More

    Holley HP EFI Plug and Play ECU and Harness kit for GM LS2/3/7 NTK Sensor

    Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more. Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, nitrous...

    MSRP: $3,341.95
    $2,969.95
    Add to Cart The item has been added
  • Holley Performance Parts – EFI, Intakes, & More HP EFI Plug and Play ECU AND HARNESS, LS1/LS6, NTK 02 sensor, automotive wiring harness and electronic controller for engine management systems.

    Holley Performance Parts – EFI, Intakes, & More

    HP EFI Plug and Play ECU AND HARNESS, LS1/LS6, NTK 02 sensor

    Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more! Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, nitrous...

    MSRP: $3,341.95
    $2,969.95
    Add to Cart The item has been added
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