Holley Sniper 550-511K EFI 4150 4-Barrel Self-Tuning Master Kit

Description

Features a throttle body mounted ECU, It is capable of supporting up to 650 HP, Will fit single and dual plane intake manifolds, Has an integrated ignition timing control & coil driver, Comes with a color touchscreen for easy setup and gauge displays
Holley Sniper 550-511K EFI 4150 4-Barrel Self-Tuning Master Kit
Sku # 425550511K
Mfr. Part # 550-511K
Condition
New
Brand
Holley Sniper
Sold
Each
Details
Info
Put an end to mysterious air/fuel ratios, jet changes, and cold-start rough idle troubles with Holley Sniper EFI. Affordable aftermarket fuel injection is here and it couldn't be any easier to install on your vehicle. Holley Sniper EFI is a perfect match for any muscle car, classic truck, street rod, or nearly any other carbureted vehicle. Economically priced to save your hard earned money for other parts of your build; Holley Sniper EFI is a self-tuning, plug and play fuel injection system that takes all the trouble and guesswork out of your switch to modern electronic fuel injection. With over 100 years of building quality fuel systems, you can trust Holley Sniper with all your electronic fuel injection needs!
Holley Sniper EFI is packed with all the features that your car or truck needs. This throttle body fuel injection replaces any square bore or spread bore style 4-barrel carburetor. The built in ECU keeps the wiring neat and tidy with no need to run the computer and associated wiring back into the cab of the vehicle. Connect the 4 necessary wires and you're good to go. The self-learning ECU takes care of setting the baseline tune while the full touchscreen display allows you to fine tune as you please. Sniper EFI throttle bodies utilize OEM style TPS and IAC modules for dependable and serviceable use. Life is too short to hassle with cold start issues, hesitations, flooding, and carburetor inconsistencies. Leave that old 4-barrel to rest and bring in a new era of performance, reliability, and fun with a Holley Sniper EFI system!
Holley Sniper EFI Master Kits include everything you will need to get your new Sniper EFI throttle body setup and running on any of your vehicles. Master Kits include 20 feet of 3/8" EFI fuel hose, in-line electric fuel pump, pre and post filters, return bulkhead, and all of the needed fuel fittings and hardware to get your system plumbed, wired up and running in no time.
Direct carburetor replacement
Fits single and dual plane intake manifolds
Naturally aspirated applications only
Throttle body mounted ECU - no extra computers to mount or relocate
Capable of supporting up to 650 HP
Simple, 4 wire connection (Battery +, Battery -, Switched ignition & RPM)
Built in pre-set fuel pressure regulator
Integrated ignition timing control & coil driver
Color touchscreen for easy setup and gauge displays
Self tuning ECU means you dont have to be a computer/tuning expert to enjoy EFI
Black finish
Sold individually
Charts
(PDF)
(PDF)
(PDF)
WARNING: Cancer and Reproductive Harm -- p65Warnings.ca.gov
California Customers: This part has been identified as emissions sensitive and can only legally be installed on race-use only vehicles, off-road-use only vehicles, or pre-1965 vehicles in the State of California in accordance with the California Air Resource Board (CARB) requirements. Once your order is placed you will be contacted by Speedway Motors within 2 business days so that you can certify that you will only use such parts on these types of vehicles in California.
Specs
Sold in Quantity
Kit
Color
Black
CFM
800 CFM
Carburetor Flange Type
4-Barrel Square Bore
Injection Style
Throttle Body
Metering Style
Speed density
Intake Manifold Included
No
Throttle Body Included
Yes
Distributor Included
No
Wiring Harness Included
Yes
EGR
No
Fuel Pump Included
Yes
Injectors Included
Yes
Fuel Rails Included
Yes
Calibration Module Included
Yes
TPS Sensor Included
Yes
IAC Motor Included
Yes
ECM Included
Yes
Fuel Pressure Regulator Included
Yes
MAP Sensor Included
Yes
IAT Sensor Included
Yes
Venturi Quantity
4
Emission Code
3
Throttle Bore
1.6875 (1 11/16ths)
MFG. Part #
550-511K
Self Tuning
Yes
Venturi Diameter
44.45mm
Throttle Body Barrels
4-Barrel
Throttle Body Material
Cast Aluminum
User Tunable
Yes
Injector Size
100 lbs./hr.
Throttle Body Finish
Black
Use with Power Adder
No
Max Horsepower Rating
650
GTIN Code
090127001493
Reviews
Works great!
Rated
by Brian on April 29, 2021
Summary:
Installed this on a 69 Dart 440 ci. Ran great. Amazing response.
Yes, I recommend this product.
Perfect
Rated
by Tony from Nam. on April 12, 2021
Summary:
Great
Yes, I recommend this product.
QUALITY BUILT
Rated
by CHUCK on September 05, 2020
Summary:
WILL FIND OUT
Pros:
UNKNONHAVE NOT BEEN ABLE TO UTILIZE YET
Yes, I recommend this product.
Great value
Rated
by JimG on June 28, 2019
Summary:
Great value, inline with others, No tax and free shipping. Can't wait to get this installed on my Ford 347 stroker motor.
Love this system
Rated
by Rev 22:21 on February 15, 2019
Summary:
Just finished installing system in my 68 Vette 454 6 spd. Mild roller cam.stock heads, stock dual plane manifold. stock style HEI ignition. bought this system because i was sick and tired of regular style carb. could never get a regular carb to adjust properly.( had 3 different carbs on car after rebuilt engine.) carbs were always clogging up, sat to long, always needing tunning, and always pinged so had to detune regular carbs. With this system my car has NEVER worked so great. I will say to install system i had to drop gas tank and put in return fuel line. not real big deal, since ive replaced/replaced engine and put in a T56 tranny. The biggest issue is tun ing the system and engine to system. although the system says its self learning, which is does once you start driving. the system learns air fuel ratios and such. But you ave to be able to set up you engine for proper timing( crutial) and proper running engine temp. example I didnt have proper timing on my initial startup and over heated engine. didnt break anything but had to figure out what my my issues were. Holley Tech was VERY helpful with the different people that i spoke with. The handheld comes with system( wont work without it), and is kind of complicated. I am pretty computer savy so i really wasnt overly worried. BUT there is ALOT to learn. there is a 16 page install manual and a 50+ page technical spec manual. The second one will definately make your head spins if you never dealt with EFI. Which i never had before. You dont need to an know every detail of the second manual to make it work. I didnt. i bought the system after reading MANY reviews of people with major and minor problems. some people had the worst nightmare trying to install and ended up returning it because never work for them. even after calling Holley for over months on end. Ive seen Garage Squad on TV putting these kits on vehicles they fix, so i felt confident the product was good.
Related Items / Suggested Parts
Holley Sniper 550-510K EFI 4150 4-Barrel Self-Tuning Master Kit
Holley Sniper 550-516K EFI 4150 4-Barrel Self-Tuning Master Kit
Holley 12-878 EFI Replacement Regulator Kit
Shipping
Combined Shipping:
Please take advantage of the “add to cart” button on each listing to get everything in your cart prior to completing checkout. This will ensure you receive a combined shipping rate on your entire order.
Freight Shipping:
Some products are too large for standard ground delivery and must be shipped via truck freight.
Please contact us via eBay Message for a freight shipping estimate.
When possible, please provide a business or commercial address for delivery to eliminate additional fees.
Please ensure the phone number provided is accurate to avoid delays.
Upon delivery, the recipient must inspect the shipment before the driver leaves as there may be concealed damage; please open the carton to inspect the contents. Any visual damage must be noted on the shipping document BEFORE signing for delivery. Any damage not noted before signing for delivery is the buyer’s responsibility. If damage is found, the shipment may be refused, but please contact us as soon as possible and arrangements will be made to have the product replaced and damaged parts returned.
Tech Support
We're here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through eBay Messaging and a knowledgeable Speedway Motors team member will be happy to help.
About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 69 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
Return Policy
We want you to be satisfied with your purchase. If within 60 days after you receive your shipment and you are not satisfied, you may return the item for a refund. Refunds will be processed (1-2) days after the item is received by Speedway. All returned merchandise must be in original factory condition with no modifications or alterations. A restocking fee up to 15% may be applied if items are not in new condition.
Returned merchandise must include all packaging materials, warranty cards, manuals, and accessories. If the items being returned need to be repackaged, there will be a repacking charge. Repack the item in a sturdy box, include a copy of your invoice and complete the form on the back of the invoice. You must ship orders back PREPAID. WE DO NOT ACCEPT COD SHIPMENTS.
All fiberglass items returned will be subject to a 15% restocking charge. No returns on electrical parts, DVDs, and books unless they are defective. Absolutely no returns on special order or closeout merchandise.
Payment
Accepted Payment Methods - PayPal and major credit cards are accepted.
Terms - Immediate payment is required on all listings.
To view states in which sales tax will apply to your order, please visit the “shipping and payments” tab.
Guarantee
Speedway accepts full responsibility for the accuracy of our listings and product representation. If an egregious shipping or description error occurs, we are happy to assist with a replacement or refund.
Disclaimer
Due to our large inventory and the diversity of our product line, the stock photo used may not be an exact representation of the item you are bidding on. Please read all product information carefully before purchase to avoid any order issues.