SKU: 99625247574

Holley Sniper 2 EFI Self-Tuning Fuel Injection System # HO550-510-3XX

Sale price$1192.50 Regular price$1325.00
Save 10%

Pay in installments of $331.25 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Holley Sniper 2 EFI Self-Tuning Fuel Injection System # HO550-510-3XXFuel Injection Systems, Sniper 2 EFI, Self Tuning, Throttle Body, Polished, 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, Polished, 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:

Polished

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: 99625247574

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.1 ★★★★★
Based on 21 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Asel
Phoenix, US
★★★★★ 5
Great quality, comfy fit, and perfect for active toddlers
Size: 8 Wide Toddler, Color: White, Size: 8 Wide Toddler, Color: White
These toddler sandals are very well made and feel high-quality right out of the box. The material looks like leather and has a smooth, slightly matte finish. It feels soft to the touch, doesn’t rub the skin, and at the same time seems durable enough for everyday wear. The sole is sturdy with good grip, and overall the materials used feel reliable and easy to clean. The wide toe box gives plenty of room for natural movement, and the fit is true to size. They stay securely on the foot, and the adjustable straps make them very easy to put on and take off, even with a wiggly toddler. They are lightweight and flexible, so they don’t restrict movement and are comfortable for all-day wear. The sole provides a good balance of flexibility and grip, making them suitable for both indoor and outdoor use. Overall, a great combination of quality, comfort, and practicality — highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
E
Verified Purchase
Emily Osborn
Louisville, US
★★★★★ 5
Great Sandals for Toddlers
Size: 6 Wide Toddler, Color: Brown
I love this brand of shoes, all the shoes are very flexible and easy to get on my toddler. They've help up well for us and should easily last to the next kid, if not more beyond as well. These shoes are cute and great gender neutral sandals that don't break the bank for the quality. My son loves them too, and he is very ready to make his opinions known.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 9, 2026
N
Verified Purchase
Nicholas
Port Orchard, US
★★★★★ 5
Wide toe box, works for fancy or casual
Size: 10 Wide Toddler, Color: White
Perfect fancy wide toe box shoes for toddler. Able to dress down for everyday wear as well. Really good quality, cleans off easily, flexible base, comfortable and easy for my 2 year old to put on and take off herself.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
J
Verified Purchase
J martin
Bozeman, US
★★★★★ 4
Cute but runs big and made for high volume feet
Size: 8 Wide Toddler, Color: Brown
Cute shoes, otherwise they would only get 3 stars. Do not recommend using the size chart. I used the size chart and tried to measure carefully, yet the first ones we got were literally several sizes too large for my daughter. I returned them and sized down 2 sizes, and they are workable but still on the big side. Beware. They are also extremely high volume. If my daughter wears them barefoot, there is quite a gap between her foot and the top of the sandal. If she wears socks, especially her thick winter socks, it’s closer to a decent fit. Again, beware. I would buy again…not sure. My daughter is very fond of them, and that says a lot. She’s three and has very strong opinions about things😅
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
J
Verified Purchase
Jessica h
Whiting, US
★★★★★ 5
Great for wide toddler feet
Size: 6 Wide Toddler, Color: Tan
Great for wide toddler feet and super cute.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026

recommand products