Hero image 0 of Holley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish, 0 of 11

Holley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish

Name: Holley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish
Brand: HOLLEY EFI
SKU: 850028695
Price: 2299.95 USD
Availability: InStock

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Key item features

Potent Performance: Supports up to 650 HP naturally aspirated or 600 HP forced induction with four 100lb./hr. injectors, ideal for 24x LS engines.
Stealthy Installation: All wiring exits below the fuel injector bowls, ensuring a completely hidden and clean setup.
Integrated Control: Features internal 1bar MAP sensor, integrated ignition timing control, and plug-and-play compatibility with factory LS coil sub harness.
Intuitive Interface: Includes a high-resolution full-color touchscreen for initial setup, tuning, and gauge displays, with a simple calibration wizard.
Adaptive Tuning: Self-tuning ECU with a Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time fuel map learning without a laptop.
Versatile Connectivity: Offers 4 inputs (12v, Ground, 5v, Frequency) and 4 outputs (Ground, PWM) for various accessories and sensors.
Transmission Compatibility: Provides transmission kick-down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications.

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Specs

Compatible cars
GM LS engines
Vehicle make
GM
Vehicle model
LS
Brand
HOLLEY EFI
Vehicle fitment type
Specific
Series
Terminator X

Current price is $2,299.95

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Comparison Overview:
Product	Viewing this item Holley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish current price $2,299.95 Holley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish	Holley EFI 550-1006 Terminator X Stealth 4150, Gold current price $2,249.95 Holley EFI 550-1006 Terminator X Stealth 4150, Gold	Holley EFI 550-1425 Terminator X Max Gen III HEMI 2013 and up Kit with DBW Throttle Body Control current price $2,299.95 Holley EFI 550-1425 Terminator X Max Gen III HEMI 2013 and up Kit with DBW Throttle Body Control	Holley EFI 550-1020 Terminator X Stealth 4150 24X - Shiny Finish current price $2,299.95 Holley EFI 550-1020 Terminator X Stealth 4150 24X - Shiny Finish	Holley EFI 550-1062 Terminator X Stealth 4150 58X - Gold Finish current price $2,299.95 Holley EFI 550-1062 Terminator X Stealth 4150 58X - Gold Finish	Holley EFI 550-1004 Terminator X Stealth 4150, Shiny current price $2,249.95 Holley EFI 550-1004 Terminator X Stealth 4150, Shiny	Holley EFI 550-1423 Terminator X Max Gen III HEMI 2007-2012 Kit with DBW Throttle Body Control current price $2,299.95 Holley EFI 550-1423 Terminator X Max Gen III HEMI 2007-2012 Kit with DBW Throttle Body Control	Holley EFI 550-1319 Terminator X Max Ford Mod Motor 4V - with Transmission Control current price $2,299.95 Holley EFI 550-1319 Terminator X Max Ford Mod Motor 4V - with Transmission Control	Holley EFI 550-1421 Terminator X Max Gen III HEMI 2003-2006 Kit with DBW Throttle Body Control current price $2,299.95 Holley EFI 550-1421 Terminator X Max Gen III HEMI 2003-2006 Kit with DBW Throttle Body Control	Holley EFI 550-1022 Terminator X Stealth 4150 24X - Gold Finish current price $2,299.95 Holley EFI 550-1022 Terminator X Stealth 4150 24X - Gold Finish

Comparison Chart:
Vehicle make	GMHolley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish	FordHolley EFI 550-1006 Terminator X Stealth 4150, Gold	ChryslerHolley EFI 550-1425 Terminator X Max Gen III HEMI 2013 and up Kit with DBW Throttle Body Control	GMHolley EFI 550-1020 Terminator X Stealth 4150 24X - Shiny Finish	GMHolley EFI 550-1062 Terminator X Stealth 4150 58X - Gold Finish	FordHolley EFI 550-1004 Terminator X Stealth 4150, Shiny	ChryslerHolley EFI 550-1423 Terminator X Max Gen III HEMI 2007-2012 Kit with DBW Throttle Body Control	FordHolley EFI 550-1319 Terminator X Max Ford Mod Motor 4V - with Transmission Control	ChryslerHolley EFI 550-1421 Terminator X Max Gen III HEMI 2003-2006 Kit with DBW Throttle Body Control	GMHolley EFI 550-1022 Terminator X Stealth 4150 24X - Gold Finish
Vehicle model	LSHolley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish	-Holley EFI 550-1006 Terminator X Stealth 4150, Gold	GEN III HEMIHolley EFI 550-1425 Terminator X Max Gen III HEMI 2013 and up Kit with DBW Throttle Body Control	LSHolley EFI 550-1020 Terminator X Stealth 4150 24X - Shiny Finish	LSHolley EFI 550-1062 Terminator X Stealth 4150 58X - Gold Finish	-Holley EFI 550-1004 Terminator X Stealth 4150, Shiny	GEN III HEMIHolley EFI 550-1423 Terminator X Max Gen III HEMI 2007-2012 Kit with DBW Throttle Body Control	MustangHolley EFI 550-1319 Terminator X Max Ford Mod Motor 4V - with Transmission Control	GEN III HEMIHolley EFI 550-1421 Terminator X Max Gen III HEMI 2003-2006 Kit with DBW Throttle Body Control	LSHolley EFI 550-1022 Terminator X Stealth 4150 24X - Gold Finish
Vehicle fitment type	SpecificHolley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish	UniversalHolley EFI 550-1006 Terminator X Stealth 4150, Gold	SpecificHolley EFI 550-1425 Terminator X Max Gen III HEMI 2013 and up Kit with DBW Throttle Body Control	SpecificHolley EFI 550-1020 Terminator X Stealth 4150 24X - Shiny Finish	SpecificHolley EFI 550-1062 Terminator X Stealth 4150 58X - Gold Finish	UniversalHolley EFI 550-1004 Terminator X Stealth 4150, Shiny	UniversalHolley EFI 550-1423 Terminator X Max Gen III HEMI 2007-2012 Kit with DBW Throttle Body Control	SpecificHolley EFI 550-1319 Terminator X Max Ford Mod Motor 4V - with Transmission Control	SpecificHolley EFI 550-1421 Terminator X Max Gen III HEMI 2003-2006 Kit with DBW Throttle Body Control	SpecificHolley EFI 550-1022 Terminator X Stealth 4150 24X - Gold Finish
Series	Terminator XHolley EFI 550-1021 Terminator X Stealth 4150 24X - Black Finish	Terminator X Stealth 4150Holley EFI 550-1006 Terminator X Stealth 4150, Gold	Terminator XHolley EFI 550-1425 Terminator X Max Gen III HEMI 2013 and up Kit with DBW Throttle Body Control	Terminator XHolley EFI 550-1020 Terminator X Stealth 4150 24X - Shiny Finish	Terminator XHolley EFI 550-1062 Terminator X Stealth 4150 58X - Gold Finish	Terminator XHolley EFI 550-1004 Terminator X Stealth 4150, Shiny	Terminator X MaxHolley EFI 550-1423 Terminator X Max Gen III HEMI 2007-2012 Kit with DBW Throttle Body Control	-Holley EFI 550-1319 Terminator X Max Ford Mod Motor 4V - with Transmission Control	Terminator XHolley EFI 550-1421 Terminator X Max Gen III HEMI 2003-2006 Kit with DBW Throttle Body Control	Terminator XHolley EFI 550-1022 Terminator X Stealth 4150 24X - Gold Finish

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About this item

Product details

Compatible with vehicles equipped with GM LS engines with 24x reluctor wheel configuration.;

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 features fuel maps that self-learn and integrated ignition timing control, yielding improved idle stability, drivability, and horsepower at wide-open throttle! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications? Terminator X Max kits provide plug and play Transmission control for GM 4L60 and 4L80 Transmissions.;

Terminator X Stealth 4150 Kits for 24x LS engines
Supports up to 650HP with Four 100lb./hr. Injectors
Internal 1bar MAP sensor, built into the Terminator X ECU.
All of the wiring exits below the fuel injector bowls, for a completely stealth installation
Air entry machined to fit most stock style air cleaners with air cleaner locator provisions
External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886
Integrated ignition timing control - Plug and play with factory LS coil sub harness and OEM LS coils - no external boxes/modules needed to run Coil Near Plug
High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
Simple Calibration Wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
Self-tuning ECU means you don't have to be a computer/tuning wiz to have EFI!
4 Inputs -12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (Fuel and Oil Pressure Inputs are pre-terminated)
4 Outputs - Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
OEM Style TPS/IAC, for years of dependable service
Compatible with Holley EFI digital dashes, gauges and fuel system accessories

info:

We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.

Specifications

Compatible cars

GM LS engines

Vehicle make

Vehicle model

Fuel injection accessory & part type

Terminator X Stealth 4150 EFI system

Warranty

Warranty information

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Warnings

Warning Text

California Proposition 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.com

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