Holley Sniper EFI Super Sniper Stealth 1250 - Black 550-877
Type: Super Sniper Stealth 4150 - 1250 HP
If you're looking to make some big power, the Super Sniper Stealth is made for you! Holley's Sniper EFI Super Sniper Stealth 1250 is the best way to convert your carbureted engine to fuel injection with just 4 simple connections required. Super Sniper can support up to 1250HP boosted with 8 100 LB/HR Injectors. With a Stealth 1250 system, you get that carburetor styling but the functionality of a Sniper! This 4-barrel system features a single pattern bolt on design built to fit 4150 flange manifolds. The Super Sniper Stealth ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower. Additionally, this Sniper kit also includes transmission kick down provisions for GM TH350/400, 200R4/700R4, and Ford C4/C6 applications!
We want everything to be as simple as it can be for you! Sniper kits are built and designed to be installed at home in your garage or driveway with limited tools and the support of Holley's comprehensive installation manual and videos. An afternoon in the garage and you will be enjoying improved engine performance, better MPG's and easier starting. After the simple installation it's time to let your Sniper begin the self-tuning process. Our user-friendly calibration wizard allows you to just answer a few questions about your engine and the system will begin self-tuning with no laptop required. You don't have to be a computer wiz or specialize in tuning to use a Sniper EFI system! Use the high resolution 3.5" full color touchscreen for tuning and gauge displays.
Sniper EFI is part of a complete ecosystem! Your new Sniper kit pair's seamlessly together with Holley's Sniper Hyperspark Ignition, Fuel System's, Air Cleaners, Throttle Body & Digital Dash to unlock the full potential of your build. Complete your fuel injection journey by checking out our full offer of ignition, fueling and accessories!
Features:
- Bolt on 4150 Flange Carburetor Replacement
- Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
- Throttle body mounted ECU – no extra boxes to mount
- Supports up to 1250hp with Eight 100 Lb/Hr Injectors!
- All of the wiring exits below the rear fuel injector cover, for a completely stealth installation.
- Timed spark part for vacuum advanced distributors located under the front fuel bowl, for easy access to the distributor.
- Programmable inputs and outputs
- Three Programmable 0-5V Sensor Inputs for Oil/Fuel/Dome or Nitrous Pressure Sensors
- Six Programmable Ground Outputs
- One +5v Reference Output - +5V Power Supply for 0-5v Sensors
- One Sensor Ground – Ground supply for 0-5v Sensors
- Air entry is machined to fit most stock style air cleaners with air cleaner locator provisions.
- External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886.
- Integrated ignition timing control
- The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
- OEM Style TPS/IAC, for years of dependable service.
- Available in 3 finishes: Shiny, Black and coming soon, Gold
- Included clamp-on oxygen sensor kit for 2.25" exhaust ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
Specs:
- Accelerometer Support: No
- Boost Control: No
- Brand: Holley Sniper EFI
- CAN-BUS Support: No
- Category: Air and Fuel Delivery
- CFM: 870
- Coil Per Cylinder Ignition Support: No
- Datalogging Support: Yes
- Distributor Included: No
- Dry Nitrous Control: Yes
- e85 Support: No
- EGT Support: No
- Emission Code: 3
- Finish: Black
- Flange Style: 4150
- Forced Induction Support: Yes
- Fuel Filter Included: No
- Fuel Hose Included: No
- Fuel Injectors Included: Yes
- Fuel Pressure: 58.5 PSI
- Fuel Pressure Regulator Included: No
- Fuel Pump Included: No
- Grade Type: Performance
- Height: 3.28"
- Ignition Timing Control: Yes
- Individual Cylinder Fuel Corrections: No
- Injector Size: 100 lb/hr @ 58.5 PSI
- Inlet / Outlet Size: 3/4-16 Female O-Ring (AN 8)
- Intake Manifold Included: No
- Knock Retard Support: No
- MAP Sensor: 2 Bar
- Max Horsepower Rating: 1250 Forced Induction
- Max Horsepower Rating: 650 Naturally Aspirated
- Model: 4150 EFI Conversion Throttle Body
- Multi-Stage Nitrous Control: Yes
- Part Type: Fuel Injection Conversion Kit
- Product Type: Super Sniper Stealth 4150 - 1250 HP
- Progressive Nitrous Control: Yes
- Self-Tuning: Yes
- Sub Category: Service Kits
- Throttle Position Sensor Included: Yes
- Traction Control Support: No
- Transmission: 700R4/200R4, Ford C4/C6, TH350
- User-Tuneable: Yes
- Wet Nitrous Control: Yes
Tech Resources:
Part # 534-247 is required to complete installation.
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Important Notices
- Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
