The Terminator X Max Stealth 4150 is a bolt-on carburetor-replacement EFI system with (4) 100 lb/hr fuel injectors supporting up to 650 HP naturally aspirated or 600 HP with forced induction. Its Stealth design routes all wiring below the rear fuel injector cover for a clean installation, and this configuration adds transmission control for pre-2009 GM 4L60E/4L80E transmissions.
Key Features:
- (4) 100 lb/hr fuel injectors supporting up to 650 HP N/A or 600 HP with forced induction
- 3.5" LCD handheld touchscreen for setup, tuning, and gauge displays
- Initial handheld calibration wizard creates a base tune with no laptop required
- Advanced annular discharge rings for improved fuel flow and atomization
- Bosch LSU 4.9 wideband O2 sensor for real-time fuel map learning
- OEM-style TPS/IAC design built for longevity
- Internal 1 Bar MAP sensor built into the ECU
- Bolt-on 4150 flange carburetor replacement fits many factory intake manifolds
- Air entry machined to fit many stock-style air cleaners with locator provisions
- Transmission kick-down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6
- Transmission control for pre-2009 GM 4L60E/4L80E transmissions
- Integrated ignition timing control improves idle stability, economy, and WOT power
- Four inputs (12V, ground, 5V, frequency) for pressure sensors, triggers, trans brake, etc.
- Four outputs (ground, PWM-) for fans, boost/nitrous control, IAC, etc.
- Pre-terminated fuel and oil pressure inputs
Specifications:
- Engine Platform: GM LS, 24x or 58x reluctor
- Flange Size/Style: 4150, square-bore
- Injector Size: (4) 100 lb/hr @ 58.5 PSI
- Max Horsepower Rating: 650 HP
- Fuel Pressure: 58.5 PSI (requires external regulator, e.g. Holley P/N 12-886)
- Handheld Included: Yes
- MAP Sensor: Internal, 1 Bar
- Transmission Control: GM 4L60E/4L80E (pre-2009)
- Throttle Bore: 1.75"
- Finish: Black
- Part Number: 550-1012
Not recommended for 4x4 applications with electronic transfer cases, and not compatible with 4L6X transmissions from model year 1995 or earlier due to converter lockup/downshift strategy changes. The ECU is not recommended for marine use but can be run off-road with proper mounting, weatherproofing, and wiring management. Refer to the owner's manual for full installation instructions.
FAQ
What horsepower can the Terminator X Max Stealth 4150 support?
Up to 650 HP naturally aspirated or 600 HP with forced induction, using the included (4) 100 lb/hr injectors.
Does it include a handheld for tuning?
Yes, it comes with a 3.5" LCD handheld touchscreen and a calibration wizard that builds a base tune without a laptop.
What transmissions does the 550-1012 control?
It's configured for pre-2009 GM 4L60E/4L80E transmissions, with kick-down provisions also available for GM TH350/400, 200R4/700R4, and Ford C4/C6.
Is this compatible with electronic 4x4 transfer cases?
No, it's not recommended for 4x4 applications with electronic transfer cases.
Does it require an external fuel pressure regulator?
Yes, an external regulator set to 58.5 PSI base pressure is required (Holley P/N 12-886 or equivalent).
