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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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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 553-112 PRO DASH 6.86, automotive digital display gauge showing oil pressure, oil temperature, and fuel pressure readings with colorful LED indicators on top.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 553-112 PRO DASH 6.86

    Holley's new 6.86" Pro Dash delivers over 200 monitoring channels of reliable real-time data in a more compact, full HD package suitable for nearly any motorsports application. Be assured that the Holley EFI 6.86" Pro Dash will deliver the vitals you...

    MSRP: $1,462.95
    $1,168.95
    $1,299.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley EFI 553-106 HOLLEY EFI DIGITAL DASH, a digital automotive display showing RPM, oil pressure, voltage, and other vehicle data.

    Holley Performance Parts – EFI, Intakes, & More

    Holley EFI 553-106 HOLLEY EFI DIGITAL DASH

    The Holley EFI Digital Dash is completely customizable with a variety of gauge and indicator screens that can be programmed to display any parameter you need. The dash also offers a virtual switch panel, user-defined alarms, configurable shift lights,...

    MSRP: $1,037.95
    $828.95
    $921.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-937F TERMINATOR X MPFI FORD FOX 5.0L W/TFI, automotive EFI wiring and electronics kit with various cables, connectors, and control modules.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-937F TERMINATOR X MPFI FORD FOX 5.0L W/TFI

    06.05.24IT'S BACK!This system has been put back in to production by Holley! We now have them available for sale again!Take control of your 302ci Small Block Ford engine in your Fox Body Mustang with Holley EFI Terminator X system! Don't settle for the...

    MSRP: $1,743.95
    $1,393.95
    $1,549.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-937 TERMINATOR X FORD MPFI KIT, automotive engine management system components including wiring harnesses, control modules, and display unit.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-937 TERMINATOR X FORD MPFI KIT

    Take control of your conventional Ford engine with Terminator X! Don't settle for a factory ECU with a cumbersome tuning interface or pre-programmed tuning chip when you can have complete control of your engine, self-learning fuel strategies and the...

    MSRP: $1,687.95
    $1,348.95
    $1,499.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-934 Terminator X Max MPFI with Transmission and Drive-by-Wire, automotive electronic fuel injection system with digital display and wiring harness.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-934 Terminator X Max MPFI w/Trans and DBW

    Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley...

    MSRP: $2,362.95
    $1,888.95
    $2,099.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-928 TERMINATOR X MAX 58X/4X EV6 LS MPFI KIT WITH DBW THROTTLE BODY AND TRANSMISSION CONTROL, automotive electronic control unit with wiring, for engine management and vehicle tuning.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-928 TERMINATOR X MAX 58X/4X EV6 LS MPFI KIT WITH DBW THROTTLE BODY AND TRANSMISSION CONTROL

    Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley...

    MSRP: $2,362.95
    $1,888.95
    $2,099.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-910 TERMINATOR X 58X/4X EV1 LS MPFI KIT, automotive electronic fuel injection kit with controller and wiring harness.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-910 TERMINATOR X 58X/4X EV1 LS MPFI KIT

    Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at...

    MSRP: $1,687.95
    $1,348.95
    $1,499.95
    Add to Cart The item has been added
  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-905 TERMINATOR X 58X/4X EV6 LS MPFI KIT, automotive engine management wiring harness, sensors, and electronic control module kit.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-905 TERMINATOR X 58X/4X EV6 LS MPFI KIT

    Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at...

    MSRP: $1,687.95
    $1,348.95
    $1,499.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-904T TERMINATOR X 24X/1X MULTEC 2 LS MPFI KIT - WITHOUT 3.5 inch handheld, black electronic control module with wiring harness for fuel injection system.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-904T TERMINATOR X 24X/1X MULTEC 2 LS MPFI KIT - WITHOUT 3.5" HANDHELD

    Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at...

    MSRP: $1,574.95
    $1,258.95
    $1,399.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-904 Terminator X MPFI, 4.8-6.0 Early Truck, engine electronic fuel injection controller with display and wiring harness.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-904 Terminator X MPFI, 4.8-6.0 Early Truck

    Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at...

    MSRP: $1,687.95
    $1,348.95
    $1,499.95
    Add to Cart The item has been added
  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-870 Sniper Stealth 4150 Shiny, a shiny metallic fuel injection system with a digital display.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-870 Sniper Stealth 4150 Shiny

    The Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Sniper Stealth 4150 ECU is capable of fuel map self-learning and...

    MSRP: $1,687.95
    $1,348.95
    $1,499.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 550-1001 TERMINATOR X STEALTH 4150, SHINY - a high-performance fuel injection system with a metallic intake, black electronic control unit, and connected wiring and sensors.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 550-1001 TERMINATOR X STEALTH 4150, SHINY

    The Terminator X Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Terminator X ECU is capable of fuel map self-learning and...

    MSRP: $2,249.95
    $1,798.95
    $1,999.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 554-166 I/O Expansion Holley EFI and Terminator X, black electronic control module with connectors for automotive performance tuning.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 554-166 I/O Expansion Holley EFI and Terminator X

    This adds AWESOME functionality to your Holley HP, Dominator, or Terminator X EFI system.The Holley EFI CAN Input/Output Module can be added to Holley EFI HP, Dominator, Terminator X and Terminator X Max EFI installation. This CAN module will add eight...

    MSRP: $562.95
    $448.95
    $499.95
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  • sale
    Holley Performance Parts – EFI, Intakes, & More Holley 554-165 I/O Expansion Holley EFI and Terminator X with harness, automotive electronic control module with wiring harness and colored sensor wires.

    Holley Performance Parts – EFI, Intakes, & More

    Holley 554-165 I/O Expansion Holley EFI and Terminator X w/ harness

    This adds AWESOME functionality to your Holley HP, Dominator, or Terminator X EFI system.The Holley EFI CAN Input/Output Module can be added to Holley EFI HP, Dominator, Terminator X and Terminator X Max EFI installation. This CAN module will add eight...

    MSRP: $562.95
    $448.95
    $499.95
    Add to Cart The item has been added
  • Holley Sniper EFI Throttle Bracket kit, package with metal brackets, bolts, nuts, and washers for vehicle throttle installation.

    Holley Sniper EFI Throttle Bracket kit

    (1)

    One of the things that is most difficult things about the awesome conventional Sniper systems is getting the throttle cable from your carb to work with the sniper. The conventional Sniper is a bit wider than a carb, and that can cause some issues...

    (1)

    $46.99
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