Holley 550-1012 EFI Terminator X Max Stealth 4150 - Black

Pre-2009 GM 4L60E/4L80E Transmission Control - 650 HP

Part Number: 550-1012

The Terminator X Stealth 4150 system features (4) 100 lb./hr. fuel injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. Taking the Stealth name, all of the wiring exits below the rear fuel injector cover for a clean installation. The timed spark port for vacuum advanced distributors is located under the front fuel bowl, giving greater access to the distributor. Air entry is machined to fit most stock air cleaners with air cleaner locator provisions. The ECU features fuel maps that self-learn and integrated ignition timing control, yielding improved idle stability, drivability, and horsepower at wide-open throttle (WOT). The Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications for making installation more convenient. We also provide transmission control for Pre-2009 GM 4L60E/4L80E transmissions.

Features and Benefits

• (4) 100 lb./hr. fuel injectors supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications
• 3.5” LCD handheld touchscreen for setup, tuning, gauge displays, and other viewing parameters
• Initial handheld calibration wizard creates a base tune with no laptop needed
• Advanced annular discharge rings for more fuel flow and better fuel atomization, nearly elimating the fuel delay issues found on other designs
• Bosch LSU 4.9 Wideband Oxygen (O2) Sensor for maximum performance on real time fuel map learning
• OEM style TPS/IAC robust design for longevity
• Internal 1 Bar MAP sensor built into the ECU
• Bolt on 4150 flange carburetor replacement fits many factory intake manifolds
• Air entry is machined to fit many stock style air cleaners with air cleaner locator provisions
• Provide transmission control for Pre-2009 GM 4L60E/4L80E transmissions
• Integrated ignition timing control improves idle stability, fuel economy, and wide open throttle (WOT)
• All wiring exits below the rear fuel injector cover for a stealth installation
• For 24x or 58x GM LS engines
• Four inputs include 12V, ground, 5V, and frequency, for pressure sensors, activation triggers, trans brake, etc.
• Fuel and Oil Pressure inputs are pre-terminated
• Four outputs include ground, PWN-, for fans, boost and nitrous control, IAC, etc.
• Requires an external fuel pressure regulator with base pressure set to 58.5 PSI (Holley P/N 12-886 or equivalent)

Not recommended for 4x4 applications with electronic transfer cases, not compatible with 4L6X transmissions from model year 1995 or prior due to year-by-year changes in converter lockup and downshift strategy. ECU is not recommended for marine applications, but can be used on off-road applications as long as you choose a safe location, keep it dry, protect from heat, and ensure proper wiring management. Please refer to your owners manual for further installation instructions. Requires an external fuel pressure regulator with base pressure set to 58.5 PSI (Holley P/N 12-886 or equivalent).