Holley Sniper 2 EFI Self-Tuning Fuel Injection System Master Kit Polished 800 CFM 650 HP

Holley Sniper 2 EFI Self-Tuning Fuel Injection System Master Kit Polished 800 CFM 650 HP

The Sniper 2 EFI takes the proven Holley self-tuning EFI platform and adds 14 advanced features to simplify installation, boost reliability, and modernize performance. This 4-barrel (4150 flange) conversion system powers engines up to 650 HP naturally aspirated or 575 HP on boost with four 100 lb/hr injectors, delivering easy cold starts, smoother drivability, and improved fuel economy—without the guesswork of traditional carburetors.

• Self-tuning with calibration wizard: answer a few simple engine questions to create a base map and begin self-tuning—no laptop required.
• Minimal wiring footprint: only four connections are needed: Battery+, Battery-, Switched Ignition, and RPM.
• Powerful, modern ECU: next‑generation ECU delivers improved RF noise and interference resistance, designed to stand up to older wiring, noisy alternators, and faulty plug wires.
• Polished 800 CFM throttle body: redesigned throttle shaft and plate geometry provide a smoother, more linear throttle feel.
• Sniper Ecosystem compatibility: seamless integration with plug-n-play Hyperspark ignition systems, fuel systems, multiple displays, and more for a complete, modern EFI solution.
• Integrated ignition timing flexibility: main harness includes plug-and-play HyperSpark distributor support for integrated timing control, helping simplify ignition setup.
• Hidden Harness for clean install: rear-exit "Hidden Harness" wiring keeps the engine bay looking tidy and organized.
• Adapters for other ignition types: 558-329 CD Box to Sniper 2 and 558-330 MSD Pro Billet / Crank Trigger to Sniper 2 adapters available separately.
• Versatile display and tuning interfaces: choose from a 3.5-inch full-color LCD handheld, a 5-inch Digital Dash, or a Bluetooth dongle for wireless access.
• Optional Power Distribution Module (PDM): isolates the core EFI and ignition wiring in one compact module—slide stripped wire ends under the positive lock connector and tighten. Battery and a switched 12-volt source power the PDM and Sniper EFI.
• Easy home installation: designed for garage-style setup with limited tools, guided by Holley’s installation manual and videos to get you driving quickly.
• Performance you can feel: modern cold starts, smoother drivability, and improved fuel economy compared to traditional carbureted setups.
• Max power readiness: supports up to 650 HP naturally aspirated or 575 HP on boost with four 100 lb/hr injectors (NEW).
• Built to endure real-world wiring: upgraded RF noise and interference resistance helps the system stay reliable in varied electrical environments (NEW).

Polished finish, powerful 800 CFM capability, and a self-tuning approach combine to deliver a modern fuel-injection experience that respects classic engines while unlocking modern performance. If you’re upgrading from a carburetor and want a system that’s both easy to install and capable of evolving with your setup, Sniper 2 EFI provides a targeted, race-bred solution.