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Description
Holley Sniper 550-841 EFI Stealth 4500, Shiny FinishOverview: Introducing the Sniper Stealth 4500 EFI System! Wanting to convert your Dragster or Pro street vehicle to Fuel Injection? Look no further! The Sniper Stealth 4500 EFI system from Holley features 8, 100LB HR Fuel Injectors capable of supporting 800 to 1500 HP naturally aspirated, or 800 1250 HP on forced induction applications. The Sniper Stealth 4500 also features multiple Input and Output options for sensor inputs and switched outputs to
Overview:
Introducing the Sniper Stealth 4500 EFI System! Wanting to convert your Dragster or Pro-street vehicle to Fuel Injection? Look no further! The Sniper Stealth 4500 EFI system from Holley features 8, 100LB/HR Fuel Injectors capable of supporting 800 to 1500 HP naturally aspirated, or 800-1250 HP on forced induction applications. The Sniper Stealth 4500 also features multiple Input and Output options for sensor inputs and switched outputs to control external relays. This system also comes with a USB to CAN tuning cable and free downloadable Sniper EFI Software give you unlimited control of your engine
Features:
- Supports up to 1500 HP Naturally Aspirated or 1250 HP Forced Induction with Eight 100 Lb/Hr Injectors
- Compatible with Draw through or Blow through forced induction applications
- 2.125" Throttle Plates, Flow 1440 CFM for large cubic inch engines
- 2.5Bar MAP Sensor
- Integrated ignition timing control
- Programmable launch control via 2-step and timing retard. Both can be triggered by a trans-brake input
- Gen 3 Ultra Dominator Style 4 Bolt Air Cleaner Flange
- -8AN Fuel Inlets
- 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 realtime Fuel Map Learn
- Built-in Single Stage Wet or Dry progressive nitrous control
- Three Programmable 0-5V Sensor Inputs for Oil/Fuel/Dome or Nitrous Pressure or other critical information
- Six Programmable Ground Outputs, Five programmable ground inputs. These can be used to trigger or control external devices such as nitrous solenoids, boost control solenoids. Or to provide the ECU with an Input to turn on function such as an ignition timing
- One +5v Reference Output - +5V Power Supply for 0-5v Sensors, One Sensor Ground - Ground supply for 0-5v Sensors
- Throttle body mounted ECU - no extra boxes to mount
- Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
- Required external fuel pressure regulator, 12-848 is recommended
- Customizable secondary fuel pump output (TPS, RPM or Boost enabled)
- User friendly Boost Control with handheld adjustability
- Free Software included comprehensive datalogging tool to help you maximize the performance of your engine
- Real-time datalogging to the included 3.5" Touch Screen, allows you to save information to the SD card without needing a communication cable
- Programmable Target Air Fuel Ratios per Boost level
- Advanced boost control available via free Sniper EFI tuning software, including Boost vs RPM and Boost vs Time
- OEM Style TPS/IAC, for years of dependable service
- Included clamp-on oxygen sensor kit ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
- Patent Pending
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley Sniper EFI |
|---|---|
| CFM | 1440 |
| Coast Guard Approved | Yes |
| Emission Code | 3 |
| Finish | Shiny |
| Flange Size | 4500 |
| Flange Style | 4500 |
| Fuel Pressure | 58.5 PSI |
| Height | 3.85" |
| Injector Size | 100 lb/hr @ 58.5 PSI |
| Inlet / Outlet Size | 8AN |
| MAP Sensor | 2.5Bar |
| Max Horsepower Rating | 1250 Forced Induction |
| Max Horsepower Rating | 1500 Naturally Aspirated |
| Product Type | Sniper EFI 4500 |
| Throttle Bore | 2.125 inch |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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4.3 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 4
Very expensive but quality product
Size: 16 Fl Oz (Pack of 1)
Love this stuff. Helps avoid cuts and nicks and makes the razor glide nicely. Also has a nice smell. Only thing I dont like is this stuff is VERY VERY pricey.
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Reviewed in the United States on June 11, 2025
★★★★★ 5
Different in a good way
Size: 16 Fl Oz (Pack of 1)
I’ve tried every type of shaving cream, foam, gel, etc. and this is my favorite. It’s different than other options because it’s more like a lotion so it takes some time getting used to how it works, but once you do it becomes clear that it performs really well. It’s easier to see where/what you’re shaving, it’s very smooth, and it feels nice on the skin. I initially balked at the price, but you need so little for every shave that the bottle lasts me about 3 years(!) so it works out to be pretty cost effective.
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Reviewed in the United States on March 28, 2026
★★★★★ 5
Great for shaving!
Size: 16 Fl Oz (Pack of 1)
Great for your face. I have been using this exclusively for years. My skin is sensitive and this works wonders. Highly recommended.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
• Create a signature fragrance for a foaming dispenser
Scent: Palo Santo, Size: 16 Fl Oz (Pack of 2), Scent: Palo Santo, Size: 16 Fl Oz (Pack of 2)
One of the features that I enjoy about liquid soap is its ability to quickly refresh skin. This Palo Santo product is certainly one of the most unique offerings on the market; it is warm and pleasant, albeit a short-lasting fragrance as should be expected of any body wash. While most customers will consider using this product exclusively as a body wash, my preference is to enjoy it throughout the day as a hand and face refreshment.
Use a foaming soap dispenser
This product can be used as a daily hand and facial wash. Now, you might be thinking that this would be pretty inconvenient because the product is contained in a talI bottle with a flip-up top that can be both clumsy to use and takes up counter space. To address these problems, transfer the product into a small, foaming pump, counter top dispenser.
Now I know what you’re thinking; how is this possible? This product has a viscosity similar to syrup. It will never pass through a foaming dispenser. And you would be correct in that critique; so don’t use it straight-up from the Cremo bottle. Instead, dilute the product with water. Since I’ve used this method before with other liquid soap products, I know that it will work consistently by following a few simple steps.
The goal is to make a diluted solution of at least 90% warm water and 10% product, in other words a 9-to-1 dilution. Using a smaller ratio with too much product will likely jam the pumping mechanism because the product is too viscous to transit the foaming mechanism.
How would this be done?
Step 1. Select an empty foaming soap dispenser. The brand is not as important as long as you are able to fill it with water and soap product.
Step 2. Fill the dispenser with warm water to reach about three inches from the top of the bottle.
Step 3. Pour in Palo Santo to raise the water level to about one inch above the existing water line.
Step 4. Cover the top of the dispenser with your palm and gently mix the product and water by rocking the bottle, or stir the product until it mixes with the water. I don’t recommend shaking the bottle. Shaking will result in a lot of soapy lather escaping the container before the pump top is reattached.
Note: When filling the container, leave enough air space at the top of the dispenser for the stem and pump mechanism to be returned to the container. Overfilling just means that some product will escape when recapped.
Step 5. After the top is reattached, prime the pump a few times and the foam mixture should smoothly leave the bottle. Photo One shows the water and Palo Santo mixture. As you can see, the mixture is transparent.
The result is an easy to use hand and face foam wash. This pump spray approach means that the Cremo bottle can be stored away until a refill is needed. This process should work for every clear Cremo product.
Create your signature fragrance
The Palo Santo fragrance is unique, but its colorless appearance in a dispenser is not inviting. The product could use some color to make it more appealing and some zhoosh fragrance from another product. To accomplish this, add an extra body wash product that is both colorful and has a complementary fragrance to the original Palo Santo. All it takes is this addition to Step 3:
Step 3-PLUS. Add about a quarter inch of another liquid soap to the container and mix it as in Step 4. The result is now a colorful mixture with a more expressive fragrance.
Three different combinations
In my first trial, Palo Santo was mixed with sage and cedar wood that added an attractive teal color (see photo 2). In the second trial Palo Santo was mixed with mint and rosemary making a blue combo (see photo 3). The third trial was a mixture of coconut and black pepper creating a purple mixture (see photo 4). Each of these combinations produced a complex blend of fragrances that would appeal to family and friends.
Blend Palo Santo to your personal taste
Palo Santo has a reputation for being a “mature” fragrance. Fair enough. But it does need to be—like Old Spice(y) or Hai Karate. Instead, it can be developed into a more chic and modern choice. By adding a dash of extra ingredients, you can design a blended Palo Santo fragrance that is both more complex and appealing. Certainly, with a little experimentation, you can also create a variety of mixtures that enhance Palo Santo and broaden the spectrum of your daily hand and face wash products. Just start with your favorite Cremo product and zhoosh-it-up.
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Reviewed in the United States on September 7, 2023
★★★★★ 5
Screamo for Creamo! Update on Sage and Citrus and Cologne
Scent: Bourbon Oak, Size: 16 Fl Oz (Pack of 2)
So first off the product came exactly as depicted. The smell was good but not strong or offensive. It has a pleasing woodsy smell. The name says it all. The lather is not particularly big but that doesn’t define how clean you get. I think it cleaned me up very well with one caveat. My face is a little oily so I did purchase the Creamo face wash. The body wash really didn’t do the trick for my face which is somewhat oily. The bottle is reminiscent of the past and stylish. It overall is a great product.
I just bought the Sage and Citrus body wash. This is a great all season body wash with a more contemporary smell. It’s lighter than the Bourbon and Oak with, as stated, a citrus smell tempered with the earthy sage. Again it does not clean my oily face but I use the Creamo face wash and it does just fine. The rest of my body feels clean and the scent is light and not overpowering. Between both products I also use the shaving cream.
I enjoy the original scent. I tried the Bourbon scent with the Bourbon and Oak body wash and felt it was a little overpowering. On a good note I combined all this with the Bourbon and Oak cologne. The shaving cream last a long time and should be used sparingly. The value is in the amount you use. It’s far less than a cheaper shaving cream but offers superior protection and excellent moisturizing elements.
The cologne lasts all day and does not require but a single spray under both arms and a single spray on a wrist rubbed against the other. If you need an anti perspirant use one without a scent since this will conflict with the cologne. The value is definitely there as this cologne albeit simple in appearance has very delicate notes reminiscent of my more expensive cologne. I use Creed Vetiver for going out. This cologne has a very similar quality but is, of course, a different bouquet.
Overall the whole line of Creamo products seems to be well thought out and outshines many higher end products such as Clinique or Brickell which I have also used. It comes down to value and quality. That’s where it really wins. It’s made in California where I live!
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Reviewed in the United States on August 23, 2019