Air and Fuel Fuel Injection Systems and Components - Electronic

Holley

Sniper 2 EFI Self-Tuning System

$2,932.33

SKU: 550-510DK

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Holley Sniper 2 EFI is a self-tuning, easy-to-install electronic fuel injection conversion system designed for carburetors with a 4-barrel 4150 flange. It offers features like easy cold starts, smooth drivability, and improved fuel economy for classic vehicles. The system includes a 5-inch handheld display and a genuine Bosch LSU 4.9 wideband oxygen sensor for real-time fuel map learning. It supports up to 650hp naturally aspirated or 575hp on boost.
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Make your classic vehicle drive like a modern fuel-injected machine with the Holley Sniper 2 EFI conversion system. The Sniper 2 features a "hidden harness" design for a clean appearance and an onboard contactless magnetic TPS sensor for accurate readings. This Sniper 2 EFI system boasts a shiny finish and includes four 100 lb/hr injectors capable of supporting up to 650 horsepower naturally aspirated or 575 horsepower on boost. It utilizes a genuine Bosch LSU 4.9 wideband oxygen sensor for real-time fuel map learning and features a user-friendly setup wizard that guides you through a few simple questions about your engine, creating a base map for self-tuning without the need for a laptop. The system is compatible with the complete Sniper EFI Ecosystem, including Hyperspark ignition systems, fuel systems, and multiple user interfaces. Key new features for Sniper 2 include improved RF noise and interference resistance in the ECU, a redesigned throttle shaft and plate for a smoother feel, and an optional Power Distribution Module (PDM) that simplifies wiring. It requires only four wiring connections: Battery+, Battery-, Switched Ignition, and RPM. The system also integrates transmission kickdown provisions for GM TH350/400, 200-4R/700R4, and Ford C4/C6 applications. Adapters for other ignition types, such as CD boxes or MSD Pro Billet distributors, are sold separately. This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles, specifically those manufactured in 1965 or older (US) or 1967 or older (Foreign). It is against the law to install this part on an Emissions Controlled Vehicle (1966 and newer US, 1968 and newer Foreign).

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandHolley
Part Number550-510DK
CategoryAir and Fuel

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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