The Super Sniper Stealth 1250 gives carbureted engines classic four-barrel carburetor styling with the functionality of Holley's Sniper EFI. This single-pattern bolt-on system fits 4150 flange manifolds with just 4 wiring connections and supports up to 1250 HP boosted. The self-learning ECU handles fuel mapping and ignition timing control for improved idle stability, drivability, and wide-open throttle power, and it includes transmission kickdown provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications.
Key Features:
- Genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learning
- Included clamp-on oxygen sensor kit for 2.25" exhaust with stainless steel T-bolt clamps and a weldable stainless steel O2 flange
- Air entry machined to fit most stock-style air cleaners with air cleaner locator provisions
- OEM-style TPS/IAC for years of dependable service
- Six programmable ground outputs
- Bolt-on 4150 flange carburetor replacement
- Throttle body mounted ECU, no extra boxes to mount
- External fuel pressure regulator required, set to a base pressure of 58.5 PSI (such as Holley P/N 12-886)
- One sensor ground supply for 0-5V sensors
- Programmable inputs and outputs
- Integrated ignition timing control
- Timed spark port for vacuum-advance distributors located under the front fuel bowl for easy access
- Self-tuning ECU means no computer or tuning experience is required
- Three programmable 0-5V sensor inputs for oil/fuel/dome or nitrous pressure sensors
- Supports up to 1250 HP with eight 100 lb/hr injectors
- All wiring exits below the rear fuel injector cover for a completely stealth installation
Specifications:
- Flange Style: 4150
- CFM: 870
- Height: 3.28 in.
- Fuel Pressure: 58.5 PSI
- Injector Size: (8) 100 lb/hr @ 58.5 PSI
- Inlet/Outlet Size: 3/4-16 Female O-Ring (AN 8)
- MAP Sensor: 2 BAR
- Max Horsepower Rating: 650 HP naturally aspirated, 1250 HP forced induction
- User Interface: 3.5 in. Handheld
- Transmission Compatibility: 700R4/200R4, Ford C4/C6, TH350
- Finish: Black
- Part Number: 550-877
Holley P/N 534-247 is required to complete installation.
FAQ
What horsepower does the Super Sniper Stealth 1250 support?
Up to 650 HP naturally aspirated or 1250 HP boosted, with the included eight 100 lb/hr injectors.
Is an external fuel pressure regulator required?
Yes, an external regulator such as Holley P/N 12-886 is required, set to a base pressure of 58.5 PSI.
What else do I need to complete this installation?
Holley P/N 534-247 is required to complete the installation.
Does this system support automatic transmission kickdown?
Yes, it includes kickdown provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications.
What flange does this throttle body use?
A 4150 flange, bolting on as a direct carburetor replacement.