The Terminator X Stealth 4500 EFI system bolts on as a carburetor replacement and features eight 100 lb/hr fuel injectors capable of supporting up to 1,500 HP naturally aspirated or 1,250 HP on forced induction. It's designed to fit Gen 3 Ultra Dominator air cleaners and fuel crossovers, making it easy to convert a 4500-equipped 800+ horsepower dragster or door car to EFI.
Key Features:
- Bolt-on 4500 flange carburetor replacement
- Supports up to 1,500 HP naturally aspirated or 1,250 HP forced induction with eight 100 lb/hr injectors
- 2.125 in. throttle plates flowing 1,440 CFM for large cubic inch engines
- Gen 3 Ultra Dominator-style 4-bolt air cleaner flange for a variety of air cleaner options
- Requires an external fuel pressure regulator (such as Holley 12-848)
- Integrated ignition timing control
- 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
- OEM-style TPS/IAC for long-term reliability
- Included weld-in O2 sensor bung for a leak-free oxygen sensor install
- Built-in 1bar MAP sensor with included vacuum hose adapters (1/8, 1/4, and 3/16 in.)
- Internal MAP sensor can be disabled for boosted applications in favor of an external MAP sensor (terminated connector included)
- Plug-and-play compatible with Holley EFI gauges, shift lights, modules, and digital/pro dashes (553-106, 553-111, 553-112)
Specifications:
- Flange Size/Style: 4500 Dominator
- CFM: 1,440
- Throttle Bore: 2.125 in.
- Injector Size: 100 lb/hr @ 58.5 PSI
- Inlet/Outlet Size: 8 AN
- Fuel Pressure: 58.5 PSI
- MAP Sensor: 1 bar (internal, with external option)
- Max Horsepower Rating: 1,500
- Handheld Included: Yes
- Ignition Type: Universal
- Finish: Shiny
- Part Number: 550-1070
Requires an external fuel pressure regulator (such as Holley 12-848) set to a base pressure of 58.5 PSI.
FAQ
How much horsepower can this system support?
Up to 1,500 HP naturally aspirated or 1,250 HP on forced induction, using the included eight 100 lb/hr injectors.
What flange does this system use?
A 4500 Dominator flange with 2.125 in. throttle plates flowing 1,440 CFM.
Does it fit Gen 3 Ultra Dominator air cleaners?
Yes, the air cleaner flange is designed to fit Gen 3 Ultra Dominator-style air cleaners and fuel crossovers.
Do I need an external fuel pressure regulator?
Yes, an external regulator set to 58.5 PSI base pressure is required, such as Holley part 12-848.
Can I run an external MAP sensor instead of the internal one?
Yes, the internal 1bar MAP sensor can be disabled for boosted applications in favor of an external sensor; the harness includes a terminated connector.
Does it include a handheld tuner?
Yes, a high-resolution full color touchscreen handheld is included for setup, tuning, and gauge displays.
