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Air and Fuel› Fuel Injection Systems and Components - Electronic

Holley

Sniper 2 EFI Master Kit Return Retrofit

$2,249.95 $1,999.95 Save $250.00

SKU: H00E 550-510-3XR

In Stock
In Stock
Ships by Jun 7
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Holley Sniper 2 EFI Fuel Injection Conversion Kit (550-510-3XR) is a universal-fit engine management system designed to replace 4-barrel (4150 flange) carburetors in classic vehicles. It features a shiny finish and a 3.5-inch handheld display. This kit supports up to 650 HP (naturally aspirated) and 575 HP (forced induction) with four 100 lb/hr injectors. It includes a next-generation ECU with improved RF noise resistance and a redesigned throttle body. The system offers plug-and-play HyperSpark distributor support, a "Hidden Harness" design, built-in single-stage progressive nitrous control, and integrated boost control.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandHolley
Part NumberH00E 550-510-3XR

Videos

Holley Sniper EFI 2 Install with David Freiburger on Roadkill Garage | MotorTrend Exclusive

Holley Sniper EFI 2 Install with David Freiburger on Roadkill Garage | MotorTrend Exclusive
Holley Sniper 2 EFI: Your Complete Installation Guide To Sniper 2

Holley Sniper 2 EFI: Your Complete Installation Guide To Sniper 2
Holley How To: Install Sniper EFI

Holley How To: Install Sniper EFI
From Carb to EFI!@HolleyPerformance Sniper Install on Mallory’s ’65 Mustang

From Carb to EFI!@HolleyPerformance Sniper Install on Mallory’s ’65 Mustang
Putting Holley Sniper 2 Kit On My 1986 F250... Check It Out!!!!

Putting Holley Sniper 2 Kit On My 1986 F250... Check It Out!!!!
Product Review: Holley Sniper EFI 2 - Is It Worth It? #productreview

Product Review: Holley Sniper EFI 2 - Is It Worth It? #productreview
Expert Tips for Installing the Holley Sniper EFI 2 Fuel System

Expert Tips for Installing the Holley Sniper EFI 2 Fuel System
Holley Sniper 2 EFI: The #1 Selling EFI Conversion Just Got Better

Holley Sniper 2 EFI: The #1 Selling EFI Conversion Just Got Better
Holley Sniper EFI Installation | 1967 Chevelle

Holley Sniper EFI Installation | 1967 Chevelle
Upgrading from Sniper 1 to Sniper 2 EFI: Installation Guide for Enhanced Performance

Upgrading from Sniper 1 to Sniper 2 EFI: Installation Guide for Enhanced Performance
Holley Sniper EFI Conversion!

Holley Sniper EFI Conversion!
EFI that YOU CAN DO - High Boy 390 + Sniper 2 = BAD MF

EFI that YOU CAN DO - High Boy 390 + Sniper 2 = BAD MF
My Honest Holley Sniper 2 Review, Oh And It Is Short...

My Honest Holley Sniper 2 Review, Oh And It Is Short...
Upgrade Your Classic Sniper EFI with our Sniper 2 EFI Conversion Kits | Holley Performance

Upgrade Your Classic Sniper EFI with our Sniper 2 EFI Conversion Kits | Holley Performance

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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