SKU: 41953275415

Holley Sniper 2 EFI Self-Tuning Fuel Injection System # HO550-511-3XX

Sale price$1192.50 Regular price$1325.00
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Description

Holley Sniper 2 EFI Self-Tuning Fuel Injection System # HO550-511-3XXFuel Injection Systems, Sniper 2 EFI, Self Tuning, Throttle Body, Black, 4150 Flange, 800 cfm, Kit Fuel Injection Style: Throttle body Fuel Injection System Type: Single 4 Barrel Throttle Body (4150 Flange) Maximum Horsepower with Gas: 650 Timing Control Compatible: Yes Power Adder Compatible: Yes ECM Included: Yes Self Tuning: Yes User Tunable: Yes Fuel Pump Included: No EGR: No Transmission Controller Included: No Metering Style: Speed density

Fuel Injection Systems, Sniper 2 EFI, Self-Tuning, Throttle Body, Black, 4150 Flange, 800 cfm, Kit

Fuel Injection Style:

Throttle body

Fuel Injection System Type:

Single 4-Barrel Throttle Body (4150 Flange)

Maximum Horsepower with Gas:

650

Timing Control Compatible:

Yes

Power Adder Compatible:

Yes

ECM Included:

Yes

Self Tuning:

Yes

User Tunable:

Yes

Fuel Pump Included:

No

EGR:

No

Transmission Controller Included:

No

Metering Style:

Speed density

Intake Manifold Included:

No

Multi-Port Fuel Rails Included:

No

Throttle Body Included:

Yes

Throttle Body Mounting Flange:

4-barrel square bore

Venturi Quantity:

4

Airflow Rate (cfm):

800 cfm

Throttle Body Material:

Cast aluminum

Throttle Body Finish:

Satin black

Injectors Included:

Yes

Injector Size (lbs/hr):

100 lbs./hr.

Calibration Module Included:

Yes

Wiring Harness Included:

Yes

Oxygen Sensor Included:

Yes

Fuel Pressure Regulator Included:

No

Distributor Included:

No

MAP Sensor Included:

Yes

IAT Sensor Included:

Yes

TPS Sensor Included:

Yes

IAC Motor Included:

Yes

Quantity:

Sold as a kit.

Holley Sniper 2 EFI Self-Tuning Fuel Injection Systems

Holley Sniper 2 EFI self-tuning fuel injection systems are perfect for street rods, muscle cars, off-road trucks, or nearly any carbureted vehicle. They can put an end to cold start issues, hesitations, vapor lock, and flooding. The systems are available in standard tuning kitsor the Master kit that includes an external fuel pump. Choose from a polished or satin black finish on the throttle body.

Additional product features:

* Dual pattern bolt on carburetor replacement, designed to fit 4150 flange and spread bore manifolds
* Throttle body mounted ECU no extra boxes to mount
* Supports up to 650 hp with four 100 lb.-hr. injectors
* Only 4 wiring connections required (battery +, battery -, switched ignition, and RPM)
* Integrated ignition timing control and coil driver
* High-resolution full-color touch screen 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
* Available in base and Master kits (Master kits include complete fuel system, consisting of 20 ft. of 3/8 in. vapor guard fuel hose, 12-920 fuel pump, filters, necessary hardware, and bulkhead fitting to return fuel into the tank)
* 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 ensures a leak-free oxygen sensor installation, with stainless steel T-bolt clamps and a stainless steel (weldable) oxygen sensor flange

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 41953275415

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Joy
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★★★★★ 5
Clean, Long‑Lasting Protection Without Irritation
Scent: Bergamot & Hinoki, Size: 2.6 Ounce (Pack of 1)
This deodorant is a great pick if you want something aluminum‑free that actually holds up through a full day. The formula goes on smooth, doesn’t feel sticky, and dries down quickly without leaving residue on clothes. It has a clean, fresh scent that isn’t overpowering, and it stays consistent as the day goes on. What I appreciate most is how gentle it is — no burning, no irritation, and no chalky buildup. Even with the softer feel, the protection is strong and lasts well through heat, errands, and everyday activity. It’s one of those deodorants that feels more “skincare‑forward” than chemical‑heavy. If you’re looking for a natural option that still delivers real staying power, this one is a solid upgrade.
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Reviewed in the United States on May 23, 2026
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Elle
Waukegan, US
★★★★★ 3
Wonderful, but also couldn't stand up to the funk
Scent: Black Rose & Oud, Size: 2.6 Ounce (Pack of 1)
This was my first time using this brand and I used it faithfully for about 9 months. I've been using more natural and aluminum-free deodorants for several years now. I have sensitive underarms so I stay away from "clinical strength" or a lot of chemicals. I've tried both ladies' and men's brands (I'm a woman) and they only seem to work for a little while before they completely stop working and I have to switch to something new (or back to an old one). I decided to give this one a try after seeing it pop up on Amazon a lot and also because the one I was using isn't sold in stores and would sometimes take a week or more to get to me. My first impression of this deodorant was that I like the compact, round packaging and how easy it is to use (the bottom twists very smoothly). Secondly, IT SMELLS AMAZING. Black rose and Oud is such a delicious scent - lightly floral, sweet, a little powdery, and a little musky. Every time I applied it, I kept falling more in love with the scent. And it also applied to my underarms very smoothly and without any pulling or roughness. It's worth noting that I started using this deodorant during a heat wave; we had about three weeks of temperatures between 90-100 degrees F with 75-95% humidity. Surprise surprise, this deodorant held up! Mind you, it's deodorant and not antiperspirant, so, yes, I did sweat, but, no, I did not smell. I applied it once a day (or the night before) and had no issues. This deodorant also held up exceptionally when I was exercising and it did not leave me smelling bad at all after workouts. Now, where this deodorant DID NOT HOLD UP is when it came to hormone changes and (emotional) stress. Whenever that time of the month came around, the deodorant significantly weakened and I had to apply it again during the day. For me, that's actually normal and I pretty much have that happen with any deodorant. It's performance during stress was pretty terrible though. I went through a few months of intense mental/emotional stress and this deodorant completely failed me. The second I got anxious or stressed out, my armpits would start to pool and turn into a swampy mess and I would immediately smell terrible. Not once did the deodorant hold up to my stress sweat or funk, which was very disappointing since I liked it very much outside of that one issue. I ended up just throwing it away (since I wasn't sure when the stress would stop) and going back to my previous deodorant that worked wonderfully, now sells on Amazon, and I highly recommend: Kosas! It is pricey like this one, but the main selling point for me is that it contains AHA and BHAs that stop the funk and also brighten (and keep bright) the underarm area. It also neutralizes razor burn.
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Reviewed in the United States on April 5, 2025
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Robbo
Battle Creek, US
★★★★★ 5
Fabulous deodorant and I get compliments on scent
Scent: Bergamot & Hinoki, Size: 2.6 Ounce (Pack of 1), Scent: Bergamot & Hinoki, Size: 2.6 Ounce (Pack of 1)
I've always had problems with deodorant. Irritation, complaints from ladies on the scent. I've even had a few that discolored my pits. The cheaper ones leave marks on clothing. To be fair, I was introduced to this by Thrive MRKT; and the price is cheaper there. BUT, after running out, and Thrive having low or zero stock, getting this from Amazon 12 hours after ordering, I realized this is an essential item for me. Good ingredients and lovely silky texture, you don't notice it's working. Dries super fast, not sticky or heavy texture, feels lightweight/invisible. I've even had deodorant in the past where i'd flap my arms or blow on pits hoping it would dry. No such ridiculousness here. 5/5 Stars highly recommend. Premium product and well worth the price. I even get compliments from my lady friends on this sent.
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Reviewed in the United States on April 25, 2026
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Purchaser
San Leandro, US
★★★★★ 4
I like this EXPENSIVE deodorant
Scent: Bergamot & Hinoki, Size: 2.6 Ounce (Pack of 1)
I really like the deoderant, as it seems to work well and goes on easily with no staining, etc. The reviews seem to emphasize the wonderful smell, but it is very mild and I find the smell minimal. It is rather expensive for a deodorant, but it works, so I will leave that up to the individual. Not sure if I will purchase again, but only because of the price, but I do like the product.
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Reviewed in the United States on March 22, 2026
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Gina Marciniak
Grantham, US
★★★★★ 5
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Size: 3 Fl Oz (Pack of 1)
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Reviewed in the United States on May 19, 2026

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