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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
Holley 550-871K Holley Sniper EFI Stealth 4150 Master 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. 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 | 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
4.6 ★★★★★
Based on 516 reviews
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Product Reviews
★★★★★ 5
Batana Oil for Stronger, Fuller Hair
Scent: Bright Coffee, Size: 4.06 Fl Oz (Pack of 1)
I’ve been using this Batana Oil for a few weeks now, and I’m genuinely impressed with the results. From the very first use, my hair felt softer, more nourished, and noticeably healthier. The texture of the oil is rich but not overly heavy, which makes it easy to apply without weighing my hair down.
What I love most is how it helps with dryness and frizz. My ends look less damaged, and my hair has a natural shine that I didn’t have before. I’ve also noticed less breakage when brushing, which is a huge plus. It feels like my hair is getting stronger over time.
Another great thing is that a little goes a long way, so the jar lasts longer than expected. I like to use it as a scalp treatment and also as a leave-in on my ends, and it works perfectly both ways.
If you’re looking for something to improve the overall health, thickness, and appearance of your hair, this Batana Oil is definitely worth trying. It gives that “salon-quality” feel right at home.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
★★★★★ 5
Batana oil 100%
Scent: Bright Coffee, Size: 4.06 Fl Oz (Pack of 1)
I have been using this batana oil in my hair and I really liked it. Leaves hair soft, with more shine and a healthier appearance. It feels nutritious without the need to use large amounts. It also helps control frizz and leaves the hair manageable. With constant use I have noticed that my hair looks stronger and more hydrated. Very good value for money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
★★★★★ 5
Hair Growth Game Changer
Scent: Bright Coffee, Size: 4.06 Fl Oz (Pack of 1), Scent: Bright Coffee, Size: 4.06 Fl Oz (Pack of 1)
Game-Changer for Hair Growth & Thickness
I am seriously impressed with this 100% raw organic Batana oil. I’ve tried so many hair growth products, and this is one of the few that actually delivers real results.
Within just a couple of weeks, I noticed my hair feeling softer, stronger, and way more hydrated. The biggest difference for me has been in thickness—my hair looks fuller, and I’m seeing new growth, especially around my hairline. It also adds a really healthy shine without making my hair feel greasy or weighed down.
I love that it’s all-natural and unprocessed—you can tell it’s the real deal. A little goes a long way, so the jar will last you a while. I use it a few times a week as a scalp treatment and even on my ends to prevent dryness.
If you’re struggling with thinning, breakage, or just want healthier, longer hair, I highly recommend giving this a try. Definitely a staple in my routine now!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
★★★★★ 4
This product is helping my afro hair truly thrive!
Scent: Bright Coffee, Size: 2 Fl Oz (Pack of 1)
I've used this product for 1 month so far. Applying to my scalp, hair and the ends of hair approx 1-2 times per week. These are my benefits on my long afro hair:
- First off, my scalp doesn't particularly like oil on it, it would trigger itching, dandruff, etc., but it certainly loves this stuff.
- bald spots started growing back in.
- drastic reduction in hair shed.
- For a long while, I had difficulty retaining hair moisture. My hair is FINALLY getting the nourishment and moisture it needs and deserves.
- hair is noticeably softer and even more manageable.
- I detangled my entire head within 15 minutes the other day which is a first for me.
- Hair is thickening. Which in my opinion is because my hair is shedding less. Like my braids appear half an inch thicker than they were.
- Scalp stopped itching.
- Dandruff stopped.
As far as the scent goes, it smells soo good to me. i read authentic batana oil is supposed to smell like burnt coffee. Maybe it's just me but it smells like caramelized honey.
All in all I'm soo happy i was guided to batana oil because it has done wonders for me in such a short period of time. Very happy with my purchase and would recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
★★★★★ 5
Thicker & Healthier Hair
Scent: Bright Coffee, Size: 4.06 Fl Oz (Pack of 1)
I’ve been using this Batana oil for a few weeks and I can already see a difference in my hair. My hair feels softer, thicker, and looks much healthier. The scalp oil keeps my scalp moisturized without feeling too greasy, and the natural formula gives me confidence that I’m using a quality product. I also noticed less hair shedding and better shine after regular use. The scent is natural and the mask is easy to apply. Great for both men and women who want stronger, fuller-looking hair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
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