The Sniper Stealth 4150 EFI system bolts in as a direct carburetor replacement, using four 100 lb/hr fuel injectors to support up to 650 HP naturally aspirated or 600 HP under forced induction. The throttle-body-mounted ECU handles fuel map self-learning and ignition timing control for improved idle stability, drivability, and wide-open-throttle power, and includes transmission kickdown provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications.
Key Features:
- Bolt-on 4150-flange carburetor replacement
- Throttle-body-mounted ECU — no separate control box to mount
- Supports up to 650 HP with four 100 lb/hr injectors
- Integrated ignition timing control
- High-pressure fuel crossover line included
- All wiring exits below the rear fuel injector cover for a clean install
- Transmission kickdown provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6
Specifications:
- Flange: 4150
- Flow Rating: 870 CFM
- Fuel Pressure: 58.5 PSI
- Finish: Black
- Transmission Compatibility: 700R4/200R4/C4/C6/TH350
- Injectors: 4 x 100 lb/hr
- Part Number: 550-871
This is the ECU/throttle-body kit only. A complete fuel system (regulator, hose, pump, filters, bulkhead fitting) is included in the Master Kit, part number 550-871K.
FAQ
How much horsepower can the Sniper Stealth 550-871 support?
Up to 650 HP naturally aspirated or 600 HP with forced induction.
Does 550-871 include a fuel system?
No — this kit is the ECU/throttle-body system only. For a complete fuel system, use the Master Kit, part number 550-871K.
What transmissions does it support kickdown for?
GM TH350/400 and 200R4/700R4, plus Ford C4/C6.
Where does the wiring exit on this system?
All wiring exits below the rear fuel injector cover for a clean installation.
