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Description
HOLLEY SUPER SNIPER STEALTH 4150 - EFI - up to 1250HP - BLACK FINISH - 550-877Overview: The Super Sniper Stealth 4150 EFI system from Holley features 8, 100LB HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 1250 HP on forced induction applications. The Sniper Stealth 4150 ECU is capable of fuel map self learning and ignition timing control, improving idle stability, drivability, and wide open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for
Overview:
The Super Sniper Stealth 4150 EFI system from Holley features 8, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 1250 HP on forced induction applications. The Sniper Stealth 4150 ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications.
Features:
- Bolt on 4150 Flange Carburetor Replacement
- 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.
- Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
- External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as 12-886.
- Integrated ignition timing control
- High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
- Simple Calibration Wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
- Self-tuning ECU means you don't have to be a computer/tuning wiz to have EFI!
- 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
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley Sniper EFI |
|---|---|
| CFM | 870 |
| Emission Code | 3 |
| Finish | Black |
| Flange Style | 4150 |
| Fuel Pressure | 58.5 PSI |
| Height | 3.28" |
| Injector Size | 100 lb/hr @ 58.5 PSI |
| Inlet / Outlet Size | 3/4-16 Female O-Ring (AN 8) |
| MAP Sensor | 2Bar |
| Max Horsepower Rating | 650 Naturally Aspirated |
| Model | 4150 EFI Conversion Throttle Body |
| Product Type | Sniper Stealth EFI |
| Transmission | 700R4/200R4 |
| Transmission | Ford C4/C6 |
| Transmission | TH350 |
| Warning | California Proposition 65 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 1944 reviews
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Product Reviews
★★★★★ 5
Cool Caddy
Color: Hanging-silver
This is a cool little caddy, but it must have enough space around it, otherwise, it could easily get knocked off it's mounting bracket. The caddy body itself sits smoothly into two small arms that hold it up; however, it's not a snap on tight design, so if you knock it, it will easily dismantle into the sink. We have two small sinks, it works good for it, but must have it's own little space where there isn't too much movement around it. Jus saying, and the quality is good.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Well-Designed and Durable Sink Organizer for Daily Use
Color: Suction cup-Black
The sink caddy arrived on time and was securely packaged.
The stainless steel construction feels solid and resistant to rust.
It fits neatly inside the sink without taking up too much space.
The organizer holds sponges, brushes, and dishcloths in an orderly way.
Water drains easily, helping items dry faster and stay cleaner.
Installation was simple and did not require any tools.
The design blends well with most modern kitchen sinks.
It helps reduce clutter around the sink area during daily use.
Fit may vary depending on sink size and faucet placement.
Overall, this is a practical and well-made kitchen sink accessory that works as expected.
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Reviewed in the United States on January 8, 2026
★★★★★ 4
Good little rack for sink brushes and sponges.
Color: Suction cup-Black
A lightweight little rack, works just fine. It occasionally slides up out of the suction cups that connect it, hence the 4 star rating.
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Reviewed in the United States on February 23, 2026
★★★★★ 5
Looks good. Neat and out of the way.
Color: Suction cup-Black, Color: Suction cup-Black
The suction cups didn’t stick to my sink, but the plastic strip adhered well. My husband didn’t even notice it on our sink for half a day. That was the look I was going for!
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Reviewed in the United States on May 28, 2026
★★★★★ 3
Better than the plastic ones
Color: Suction Cup-white
Stays in place on sink wall. Unfortunately it’s not coated very well and is already showing rust
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Reviewed in the United States on May 31, 2026