Get all the great features of Terminator Throttle Body Fuel Injection systems in a bolt-on system for GM’s popular LS engines! These systems are designed specifically for LS engines with carbureted style intake manifolds. All kits include the popular Terminator EFI Throttle Body for fuel delivery into the intake plenum, as well as the necessary wiring to plug directly into the factory LS coil sub-harnesses and factory sensors.
Part Number Comparison
- 550-409: GM LS1/LS6 & 1999-2007 4.8/5.3/6.0 Truck Engines with 24x crank reluctor
- 550-410: GM LS1/LS6 & 1999-2007 4.8/5.3/6.0 Truck Engines with 24x crank reluctor
- 550-421: GM LS1/LS6 & 1999-2007 4.8/5.3/6.0 Truck Engines with 24x crank reluctor - with Transmission Control
- 550-422: GM LS1/LS6 & 1999-2007 4.8/5.3/6.0 Truck Engines with 24x crank reluctor - with Transmission Control
- 550-423: GM LS2/LS3 & 2007-Current 4.8/5.3/6.0 Truck Engines with 58x crank reluctor
- 550-424: GM LS2/LS3 & 2007-Current 4.8/5.3/6.0 Truck Engines with 58x crank reluctor
- 550-426: GM LS2/LS3 & 2007-Current 4.8/5.3/6.0 Truck Engines with 58x crank reluctor - with Transmission Control
*Note: Mid-Year change on '07 Truck Engines! Identify crank wheel as follows:
- Engines with 24-tooth wheels will have a BLACK crank sensor connector on the engine
- Engines with 58-tooth wheels will have a GRAY crank sensor connector on the engine
Available With Transmission Control
Most GM vehicles built with the engines listed above were shipped with an electronically-controlled transmission. If you are using any pre-2009 4L60E/4L80E transmission then you're in luck--there's a Terminator LS TBI System that provides you with complete transmission control. Harness included. Have a 2009+ 4L60E? Contact us--we may be able to accommodate you.
Not Sure? Review this product documentation before you buy!
Owners Manual
Holley Terminator GM LS TBI Fuel Injection System
| ECU | |
| Boost Control | Yes (Additional Hardware Required) |
| DIS Outputs | None (But can be added.) |
| Family | Terminator |
| Fueling Strategy | Speed Density, Alpha-N, or combination |
| Includes Power Harness | Yes |
| Injector Drivers | Four |
| Internal Datalogging | 4GB |
| Nitrous Control | Yes (Additional Hardware Required) |
| Number of Cylinders | 8 |
| User Configurable I/O | Yes |
| User-Selectable MAP Storage | Transmission-Control Version Only |
| Water-Methanol Control | Yes (Additional Hardware Required) |
| Displays And Controllers | |
| Auto Brightness | No |
| CAN Bus Capable | Yes (Specific to Holley ECUs Only) |
| Case/Bezel Finish | Black |
| Configurable | Monitor dozens of pre-configured metrics provided by the ECU, including sensors, air/fuel ratio, switched outputs, drive-by-wire data, and more. |
| Data Logging | Yes |
| Display Type | LCD |
| Functions | Setup, Monitor, Tuning |
| Gauge/Display Size | 3.5 Inch Rectangular |
| Internal Storage | Yes (SD Card) |
| Touchscreen | Yes |
| Throttle Bodies | |
| Airflow Rate (CFM) | 950 CFM |
| Barrels (BBL) | 4 |
| Gaskets Included | Yes |
| IAC Motor Included | Yes |
| Injectors Included | Yes |
| Style | Throttle Body Injection |
| Throttle Bore Diameter (ea) | 44.45mm |
| TPS Sensor Included | Yes |
| Fuel Injectors | |
| Flow Rate (Lbs / Hr) | 80 PPH |
| Harnesses | |
| Harness Type | Power Harness, Main Harness, TBI Injector Sub-Harness, I/O Harness |
| Terminated | Yes |
| Crank Timing | |
| Sensor Harness Included | Yes |
| Sensors | |
| Type | 1 BAR MAP, Throttle Position (Integrated in TB); Coolant Temperature, Wideband O2 and Air Temperature Sensor; Fuel Pressure Sensor optional, not included |
| General | |
| Also Included | 40-Amp Relay. Many features of the Holley HP and Dominator ECU are accessible by the includedl 3.5" LCD Touchscreen Handheld Display |
| Application | GM LS1, LS2, LS3 and LS6 Engines, as well as 1999+ 4.8L, 5.3L, and 6.0L Truck Engines with 24- or 58-tooth Crank Wheel |
| Color | Polished or Hard Core Gray |
| Emission Code | 3 |
| Unit of Sale | Kit |
