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Description
Holley 550-870K Sniper Stealth 4150 Self-Tuning Fuel Injection System Master KitOverview: 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. Part # 34-42 is required for a bolt-in installation.
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 and Fuel Pressure regulator, 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 | Shiny |
| 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
4.4 ★★★★★
Based on 1746 reviews
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Product Reviews
★★★★★ 5
Pies sin grietas e hidratados
Color: 2pcs
Me encanto, hidratación completa de mis piecitos
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 5
Lovely
Color: Silver White - 02, Color: Silver White - 02
This is the best body glitter I have ever owned. I have a spray one and it is not as shiny as this one. This one has a very good appearance. It literally is shining so bright without the lights being off. This is one drop on my hand that I spread around, it does go on as a liquid and then it dries up and soak in your skin . From the bottle It has a very fresh scent like a very, very light scent, but when you put on your skin, it doesn’t smell like anything so you can still put on your regular perfume without worrying about mixing fragrances. It’s a good decent size especially considering I only did one drop and I get so much glitter!
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Perfect Champagne Shimmer for Festivals & Events
Color: Champagne Gold - 01
Color- Champagne Gold shade.
So cute! Get it! I always end up getting compliments when I wear this to festivals/concerts/event. It works great not just on your face but all over your body like arms, chest, shoulders, anywhere you want a little extra glow. It adds a really cute shimmer without being too extreme or over-the-top. I especially like wearing it to festivals or events where there are lots of lights or sunshine, because that’s when it really catches the light and looks the best.
Once it dries, it has more of a matte finish with a soft shimmer rather than looking overly dewy or greasy. The champagne color blends really nicely with my neutral/tan skin tone, so it looks natural while still adding that fun sparkle. It’s a great little addition to any festival or event outfit.
A little bit goes a long way. I’ve probably used this around 20 times already and still have at least half the bottle left. Another huge plus is that it washes off easily and doesn’t flake everywhere or leave glitter all over the floors and counters like some other body glitters I’ve tried. Overall, a great product if you want a subtle but noticeable shimmer! ✨
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Reviewed in the United States on March 6, 2026
★★★★★ 5
Buy it!
Color: Champagne Gold - 01
I love the glitter on my body, it stays and is not sticky! But does get everywhere I touch haha
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Reviewed in the United States on April 29, 2026
★★★★★ 4
LOTS of glitter
Color: Champagne Gold - 01, Color: Champagne Gold - 01
A little goes a long way, one drop is packed with glitter. Also it actually dries to matte finish, not dewy.
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Reviewed in the United States on December 29, 2025