Holley Sniper 1 to Sniper 2 EFI Polished 4150 Upgrade Kit w/ 3.5" Handheld & Fuel Regulator

Upgrading an existing Sniper EFI setup to the latest Sniper 2 platform is an easy way to improve drivability, throttle response, and tuning capability without replacing the entire EFI system. This Holley Sniper 1 to Sniper 2 EFI polished 4150 upgrade kit provides a plug-and-play solution that reuses existing wiring and sensors while delivering upgraded electronics, smoother operation, and modern self-tuning functionality.

Features and Benefits:
 - Upgrade from Sniper EFI to Sniper 2
 - Plug-and-play Sniper 2 upgrade kit
 - 3.5” handheld display included
 - Reuses existing wiring and sensors
 - Self-learning base tune setup wizard
 - Improved throttle response and system reliability
 - Hidden harness routing for cleaner installation
 - Supports future Sniper EFI upgrades
 - Polished finish throttle body included

Applications:
 - Vehicles currently equipped with Sniper EFI 4150 throttle body systems

Installation can typically be completed in less than one hour by replacing the original Sniper throttle body, connecting the included adapter harness, and following the guided setup wizard. The wizard automatically generates a self-learning base tune without requiring a laptop or prior tuning experience. Once installed, the Sniper 2 system continuously self-tunes to improve idle quality, cold starts, throttle response, drivability, and fuel efficiency. The included compact 3.5" handheld interface allows setup, basic tuning, and real-time monitoring directly from the controller while maintaining a smaller footprint than the larger 5" display. A fuel pressure regulator is also included to help maintain proper fuel system control during the upgrade. Additional Sniper 2 improvements include redesigned throttle shaft and plate geometry for smoother throttle response, improved RF interference resistance for reliable operation, enhanced CAN bus communication, hidden harness routing for a cleaner engine bay appearance, and a contactless magnetic TPS sensor for accurate throttle position readings. Existing coolant temperature and wideband oxygen sensors are reused to simplify installation, while compatibility with the complete Sniper EFI ecosystem allows future upgrades with ignition components, displays, and fuel system accessories. A polished finish throttle body completes the package with a clean, high-performance appearance.

Kit Includes:
 - Sniper 2 EFI 4150 throttle body
 - 3.5” handheld user interface module
 - Fuel pressure regulator
 - Required upgrade hardware

Specifications:
EFI System Type: Throttle Body Injection (Upgrade Kit)
Carburetor Flange: 4150 Square Bore
Finish: Polished
Control Interface: 3.5” Handheld Display
Fuel System Components: Reuses Existing System
Power Distribution Module: Not Included

Please Note:
 - Designed only for upgrading existing Sniper EFI systems.
 - Not a complete EFI kit – Fuel system components not included.
 - Sniper 2 EFI software does not support nitrous control.
 - Always verify fuel system capacity and application compatibility prior to ordering.