The Terminator X Stealth 4150 EFI system bolts on as a carburetor replacement and features four 100 lb/hr fuel injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction. The self-learning Terminator X ECU handles fuel mapping and ignition timing control for improved idle stability, drivability, and wide-open-throttle horsepower, and the Stealth 4150 includes transmission kickdown provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications.
Key Features:
- Bolt-on 4150 flange carburetor replacement
- Supports up to 650 HP with four 100 lb/hr injectors
- Transmission kickdown provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6
- Terminator X Max versions (550-1011, 550-1012, 550-1013) add transmission control for pre-2009 GM 4L60E/4L80E
- Internal 1bar MAP sensor built into the ECU
- All wiring exits below the rear fuel injector cover for a stealth installation
- Timed spark port for vacuum advance distributors, located under the front fuel bowl
- Air entry machined to fit most stock-style air cleaners
- Requires an external fuel pressure regulator set to 58.5 PSI base (such as Holley 12-886)
- Integrated ignition timing control improves idle stability, fuel economy, and WOT performance
- High-resolution full color touchscreen handheld for setup, tuning, and gauge displays
- Simple calibration wizard builds a base map from basic engine questions — no laptop required
- Includes a genuine Bosch LSU 4.9 wideband oxygen sensor for real-time fuel map learning
- OEM-style TPS/IAC for long-term reliability
- Available in Shiny, Black, and Gold finishes
Specifications:
- Flange Size/Style: 4150 Squarebore
- CFM: 950
- Throttle Bore: 1.75 in.
- Injector Size: 100 lb/hr @ 58.5 PSI
- Inlet/Outlet Size: 6 AN
- Fuel Pressure: 58.5 PSI
- MAP Sensor: 1 bar (internal)
- Max Horsepower Rating: 650
- Handheld Included: Yes
- Ignition Type: Universal
- Finish: Shiny
- Part Number: 550-1001
Requires an external fuel pressure regulator (such as Holley 12-886) set to a base pressure of 58.5 PSI.
FAQ
How much horsepower can this system support?
Up to 650 HP naturally aspirated or 600 HP on forced induction, using the included four 100 lb/hr injectors.
Does it include a handheld tuner?
Yes, a high-resolution full color touchscreen handheld is included for setup, tuning, and gauge displays.
Do I need an external fuel pressure regulator?
Yes, an external regulator set to a base pressure of 58.5 PSI is required, such as Holley part 12-886.
Does this system support transmission control?
The base Stealth 4150 includes kickdown provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6. Full transmission control for pre-2009 GM 4L60E/4L80E requires the Terminator X Max versions (550-1011, 550-1012, 550-1013).
What flange does this system use?
A 4150 squarebore flange with 1.75 in. throttle bores flowing 950 CFM.
What finish options are available?
Shiny, Black, and Gold.
