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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
4.5 ★★★★★
Based on 1979 reviews
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Product Reviews
★★★★★ 3
Nice Idea, but Durability Was Very Limited
Color: Reed, Seaweed & Corn Husk, Seaweed & Corn Silk, Number of Items: 3
These woven grass chew balls are a nice concept and made from natural materials, which I appreciated. They are lightweight, easy for dogs to carry, and can be fun for light play or supervised interaction. The texture also seems appealing for chewing and tossing around.
However, the main issue was durability. For my miniature Goldendoodle, the toys lasted only a few minutes before starting to come apart. If your dog is an active chewer, these may not hold up very long.
They may be better suited for very gentle chewers or short-term play rather than dogs that like to really chew. The natural material aspect is a plus, but longevity was disappointing.
Because of the limited durability, I’m giving these three stars. Good idea, but they did not last long enough for my dog.
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Reviewed in the United States on April 22, 2026
★★★★★ 5
Fun outdoor/indoor mental stimulation for dogs
Color: All, Number of Items: 12
These Natural dog chew toys are great; here are a few highlights from my experience:
• Woven by hand with 100% natural ingredients such as corn leaf, reed, timothy hay, corn husk corn silk, and seaweed.
• These toys are lightweight and can be used as a chew toy, play toy, or for mental stimulation. These have a light sent to them, so I hid them around our large farm and let the pups search for them by scent. It was challenging for them, but they were so excited when they found them.
• They are tied together like a puzzle rope. One of my pups loves the challenge of slowing trying to unravel this, while the other one just wants to destroy it.
• I let my dogs have these outside only, that way if they are destroyed it will just be natural fertilizer for our farm. If you want them to use them inside, they may get messy depending on how aggressive a chewer your dog is.
• Some of these will last longer than others just because they have different natural ingredients. Keep in mind that these are great, but they are not rubber, so they are not meant to last for years with a dog that is an aggressive chewer.
• Depending on your dog and how they are, these may last for a long time, or for a short time. They will last for a while if your pup is a light chewer, but if they are an aggressive chewer they may not last very long. Either way you are giving your dog a natural fun toy that will challenge them while still keeping them healthy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 20, 2026
★★★★★ 1
Did not work for my dog.
Color: Reed, Seaweed & Corn Husk, Seaweed & Corn Silk, Number of Items: 3, Color: Reed, Seaweed & Corn Husk, Seaweed & Corn Silk, Number of Items: 3
Never again will I get these. I got this for my heeler puppy and she demolished them within seconds and the pieces got stuck in her teeth. I also did some research and dogs should not eat corn husk do you own research but it’s not recommended.
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Reviewed in the United States on March 23, 2026
★★★★★ 5
Nice enrichment toy for active dogs
This is a fun interactive dog toy for days when my dog needs extra activity inside. The automatic rolling motion makes it more engaging than a standard ball. It works best on hard floors or flat surfaces, and the USB-C charging is convenient.
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Reviewed in the United States on May 11, 2026
★★★★★ 5
Good entertainment for my puppy
Style: Milk & Cookies, Style: Milk & Cookies
My puppy was 11 weeks when I got this toy. She loved the cookies because that was the pretty much only thing that she can grab and make squeaky sound. She didn’t show any interest to the milk carton or play with the holes. One week later, we put cookies and other chew toys in there and she figured out how to take them out. Sometimes she wants to put them back. And now she also play with the milk carton by chewing and carrying it. It is bigger than her. But she lifts her head up high and carrying it around. So cute.
The cookies are so bouncy when she drops them, making her to want to play more.
Update: original purchase was in August 2025. Now May 2026, both cookies and milk carton are still intact and the favorite toy of our two dogs.
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Reviewed in the United States on August 25, 2025
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