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Description
Holley 550-871 Holley Sniper EFI Stealth 4150 Kit - Black FinishOverview: The Sniper Stealth 4150 EFI system from Holley features 4, 100LB HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 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
Overview:
The Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 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. For a complete installation, Master Kits include a complete fuel system with an external fuel pressure regulator preset to 58.5psi, 20ft of 3/8" Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware, and bulkhead fitting to return fuel into the tank!
Features:
- Bolt on 4150 Flange Carburetor Replacement
- Throttle body mounted ECU - no extra boxes to mount
- Supports up to 650hp with Four 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.
- 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.
- 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
- Available in 3 finishes: Shiny, Black and coming soon, Gold
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 2298 reviews
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Product Reviews
★★★★★ 5
Sleep Well!
I ordered the 5 mg tablets by accident (meant to order 2.5), but decided not to send them back. I am glad I kept them, because the 5 mg seems to work more effectively for me than the 2.5mg did. I don't need to use them every night anymore, and think it may be that I am generally sleeping better than I did before beginning the 5 mg dosage.
As we age, our bodies don't produce as much melatonin on their own, and I have found that the Source Naturals peppermint melatonin works best for me. I have been using this brand for over 10 years now, and will continue now that I have switched to the 5mg dosage.
The melatonin doesn't keep me asleep, but seems to help me fall asleep and sleep more peacefully once I am asleep. It is a natural, non-addicting supplement, and I would much rather use something natural than something narcotic or habit forming.
I place one tablet under my tongue at bedtime and let it slowly dissolve. It takes about 10 minutes to dissolve, and usually I am almost asleep by the time it has vanished. A good night’s sleep makes for a happy and productive day following.
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Reviewed in the United States on April 8, 2016
★★★★★ 5
It’s what our bodies naturally produce but as we age we produce less
Great Natural product. Melatonin is produced by the pineal gland and as we age we produce less causing insomnia day time sleeping. You will be tired and cycle is disrupted. You take about an hour before going to bed & ready for bed. Get peaceful and let it begin to work. Nothing is abra kadabra.
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Reviewed in the United States on August 6, 2024
★★★★★ 5
Right dose and comfortable with this brand.
We have used this brand for years. I like the peppermint sub-lingual more than the swallow-whole, but I am also looking for immediate effectiveness more than timed release to last the night. This is a good product if you need something gentle to help stay asleep, and it is thought to help regulate hypnic and cluster headache events while sleeping.
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Reviewed in the United States on April 10, 2013
★★★★★ 5
Love it!
This product is always a great product! I feel so much better with this product. Researching, I found that melatonin is important in removing toxins from our bodies, and I do feel better when I take this product. If I do not take melatonin for a while then I feel sluggish and ill, and once I start back up I feel better. I like sublinguals too.
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Reviewed in the United States on June 30, 2014
★★★★★ 5
Best I have tried
Source naturals is the best brand of melatonin that I have tried. I have been using it for years to help me stay asleep. I typically fall asleep fine, but where I run into issues is staying asleep or if I wake after a few hours of sleeping. The melatonin helps me fall back asleep faster and I feel refreshed the next morning.
You will probably want to experiment with the dosage, I have found that the 5mg works best for me. And I like the peppermint flavor in lieu of the orange simply because I have usually just brushed my teeth before slipping this under my tongue.
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Reviewed in the United States on June 15, 2018