We’re still here and shipping orders—let’s build It together. Learn more.

In-Store Pickup Location

Holley Sniper EFI Self-Tuning Fuel Injection Systems 550-511K

Holley Sniper 550-511K - Holley Sniper EFI Self-Tuning Fuel Injection Systems

Loading media


In progress

Fuel Injection System, Holley Sniper EFI, Self-Tuning, Master Kit, Black Throttle Body, Kit

Estimated Ship Date: ...Loading Tomorrow
Would you rather pick it up? Select Location

  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

Hazardous Material Warning
WARNING
WARNING: Cancer and Reproductive Harm For more information, visit www.P65warnings.ca.gov.

Brand: Holley Sniper

Manufacturer's Part Number: 550-511K

Part Type: Fuel Injection Systems

Product Line: Holley Sniper EFI Self-Tuning Fuel Injection Systems

Summit Racing Part Number: SNE-550-511K

UPC: 090127739877

Maximum Horsepower with Gas: 650

Injection Style: Throttle body

Timing Control Compatible: Yes

Power Adder Compatible: No

ECM Included: Yes

Self Tuning: Yes

User Tunable: Yes

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 Pump Included: Yes

Fuel Pressure Regulator Included: Yes

Distributor Included: No

MAP Sensor Included: Yes

IAT Sensor Included: Yes

TPS Sensor Included: Yes

IAC Motor Included: Yes

Quantity: Sold as a kit.

Notes: Kit includes 4 injectors and can support up to 650 hp. Master kit includes inline fuel pump, filters, hose, hardware and fittings.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

Holley Sniper EFI self-tuning fuel injection systems deliver all the benefits—and none of the hassles. These full-featured throttle bodies are easy to install, can support a lot of horsepower, and will keep your budget intact. They put an end to carburetor cold start issues, hesitations, vapor lock, and flooding. Each of these systems include an internal fuel pressure regulator (preset to 58.5 psi), eliminating the hassle of plumbing an external model. Make your conversion simple, while getting maximum bang for your buck, with a Holley Sniper EFI self-tuning fuel injection system in your favorite available finish.

Holley Sniper EFI self-tuning systems feature:

* Available finishes: black ceramic, classic gold, and shiny
* Available in base and master kits (master kits include complete fuel system: 20 ft. of Earl's Vapor Guard fuel hose; 12-920 fuel pump; filters; necessary hardware, and bulkhead fitting for returning fuel to tank)
* Dual-pattern bolt-on carburetor replacement, designed to fit 4150 flange and spread-bore manifolds (spread bore sealing plate 9006 recommended)
* Supports up to 650 hp with four 100 lbs./hr. injectors
* 4-wire vehicle connection: battery +, battery -, switched ignition, and rpm
* Integrated ignition timing control and coil driver
* Color touchscreen for setup and gauge views
* Calibration wizard and self-tuning, integral-mounted ECU –no laptop required

Questions & Answers Ask a Product Question
Q:

Does this product require an EFI ready gas tank, or does a standard gas tank work?

Asked by SAMUEL on June 06, 2017

A:

Thank you for your question. Holley Sniper 550-511K does not require an EFI ready gas tank, however a high pressure EFI pump has to be used. Generally an EFI tank will make life easier when plumbing your fuel system.

Summit RacingSummit Racing Answer - July 13, 2017

+See All Answers (6) Answer This Question

Q:

Will this work on a 1982 corvette with a 350 ?

Asked by ONOFRE on April 23, 2020

A:

For sure. And you will love it

GEORGE V from TX answered on May 05, 2020

+See All Answers (3) Answer This Question

Q:

For engines with mechanical fuel pumps will those be able to be removed?

Asked by DAN on March 31, 2020

A:

Yes.

Holley Sniper Holley Sniper Answer - April 01, 2020

+See All Answers (3) Answer This Question

Q:

looking to install this on a 1967 thunderbird with a built 390. what linkage brackets do I need for the throttle and kick down?

Asked by JOSEPH on June 24, 2019

A:

Hook up should be the same as original with minor adjustments.

CARL from LA answered on July 17, 2019

+See All Answers (3) Answer This Question

+See All Questions (262)

Most Helpful Reviews Review This Product

99 Customer Reviews for Holley Sniper 550-511K - Holley Sniper EFI Self-Tuning Fuel Injection Systems

Average Customer Review

5 Star

(70)

4 Star

(13)

3 Star

(5)

2 Star

(2)

1 Star

(9)

+See All 99 Reviews

Sniper efi on big block Mopar

Summit RacingSummit Racing Verified Purchase

SNE-550-511K
After much debate, I went with Holley instead of the other brand because of their tech support and Holley has been around for ever. My first impressions, nice quality. liked the black finish, liked the multiple inlets for the fuel. Kit included different throttle brackets and such to make something work. I did notice a small crack in the tps sensor, I called Holley and they sent me a new one at n/c. Install was pretty easy. Took me about 4 hours to install, running all the wiring to the fans and fuel lines, all connections are keyed so you can't mess that up. Fired right up on the first try, cold starts are amazing. throttle crispness and idle are great. Only things I needed to buy separate was a weld-in o2 bung and rubber lined clamps for the fuel lines. Holley supplies a clamp on style o2 bung that won't fit around 3 1/2 collectors. The fuel pump is really quiet as compared to a Holley blue pump. I'd definitely do it again. ...read more

24 of 26 found this review helpful.

report abuse

Report Abuse X

If you feel that this review is inappropriate and should be removed from the site, report it to us by clicking the "Report Abuse" button below.

Cancel

Reviewer: from PA

Date: January 05, 2017

Appearance
Ease of Installation
Price/Value
Quality

Great upgrade for my 1970 SS Chevelle

SNE-550-511K
Great product, easy to install, and straightforward instructions. It took about 7 house for me and my neighbor to install on a Saturday night. The kit was complete with everything we needed to complete the install. I ran a new rubber fuel line for the supply line and used the existing metal fuel line for the return line and just plugged it into one of three vent tubes in the tank. This is not ideal but works until I get an efi tank at Christmas. I plugged in all the wires I needed and drilled my hole into the exhaust for the O2 sensor then answered a few questions and tried to start it. The fuel pump ground was not good enough(my fault) but once that was fixed it started right away. The throttle blades needed some adjusting and after a quick read in the manual, a simple adjustment and it runs great. It starts perfectly every time and idles very smooth, has instant throttle response and still has that old school sound. I didn’t really notice any top end gain but now I can light up the tires anytime under 30 mph where before it would stumble, hesitate or even lug off idle and at part theottle. I have complete confidence in the car now and I find myself wanting to drive it all the time. Great product and I highly recommend it to anyone looking to keep the old school look with modern drive ability. ...read more

16 of 16 found this review helpful.

report abuse

Report Abuse X

If you feel that this review is inappropriate and should be removed from the site, report it to us by clicking the "Report Abuse" button below.

Cancel

Reviewer: from TX

Date: November 19, 2017

Appearance
Ease of Installation
Price/Value
Quality

Great product

Summit RacingSummit Racing Verified Purchase

SNE-550-511K
Overall I love what this product did for my 1967 Plymouth Barracuda. Instant throttle response, perfect air fuel ratio, full panel monitoring, and no more fiddling with the carb. More torque more HP, and lots of it! The car really came alive and performed like I thought it should. It wasn't quite as easy and straight forward as they would like you to believe. I wound up getting the sniper tank and the Holley dual synq distributer before it was over (which I would highly recommend) instead of modifying my msd distributer, and stock gas tank. These components made the install more plug and play. I did not have enough supplied fuel hose for the send and return side so expect to buy more hose. If you really want to release the beast held hostage by your ancient carburetor go Holley sniper. ...read more

14 of 14 found this review helpful.

report abuse

Report Abuse X

If you feel that this review is inappropriate and should be removed from the site, report it to us by clicking the "Report Abuse" button below.

Cancel

Reviewer: from NC

Date: September 11, 2017

Appearance
Ease of Installation
Price/Value
Quality

Awesome simple complete kit

Summit RacingSummit Racing Verified Purchase

SNE-550-511K
Installed on my 74 Power Wagon 383. Huge difference in throttle response from my old truck avenger carb. Install was easy with good directions. Took about 3 hours and it was running, fired first try. Install kit had everything needed, didn't even have to run to the parts store.

10 of 10 found this review helpful.

report abuse

Report Abuse X

If you feel that this review is inappropriate and should be removed from the site, report it to us by clicking the "Report Abuse" button below.

Cancel

Reviewer: from CA

Date: December 29, 2016

Appearance
Ease of Installation
Price/Value
Quality

Pretty amazing

Summit RacingSummit Racing Verified Purchase

SNE-550-511K
Put this kit on my 91 mustang with a 399 stroker. Comes with everything you need and is well built. First crank and it fired off and ran, couldn't believe it. Definitely worth the money.

8 of 8 found this review helpful.

report abuse

Report Abuse X

If you feel that this review is inappropriate and should be removed from the site, report it to us by clicking the "Report Abuse" button below.

Cancel

Reviewer: from WA

Date: April 26, 2017

Appearance
Ease of Installation
Price/Value
Quality

Some parts are not legal for use in California or other states with similar laws / regulations

Back To Results
Email this page