Holley Sniper 2 EFI Black 4150 Returnless Kit w/ Bluetooth/ Drop-In Pump

Converting from a carburetor to electronic fuel injection can improve cold starts, throttle response, and drivability in street performance applications. This Holley Sniper 2 EFI black 4150 returnless kit provides a complete self-tuning EFI conversion for engines equipped with a 4150 square-bore 4-barrel carburetor flange while simplifying fuel system installation with a returnless configuration.

Features and Benefits:
 - Self-tuning EFI conversion system
 - Fits 4150 square-bore flanges
 - Supports 650 naturally aspirated HP
 - Supports 575 boosted HP
 - Four 100 lb/hr injectors included
 - Bluetooth tuning connectivity
 - Returnless fuel system
 - Drop-in EFI fuel pump included

Applications:
 - 4150 square-bore 4-barrel carburetor flange

The system uses an onboard calibration wizard that creates a self-learning base tune without requiring a laptop connection. Four integrated 100 lb/hr fuel injectors support engines producing up to 650 horsepower naturally aspirated or 575 horsepower with forced induction. A Bluetooth interface module allows wireless tuning and real-time monitoring through compatible mobile devices. The included returnless drop-in EFI fuel pump helps maintain consistent fuel delivery without external return plumbing. Additional updates include hidden harness routing, redesigned injector connectors, a contactless magnetic TPS sensor, and revised throttle shaft geometry for smoother throttle response.

Specifications:
EFI System Type: Throttle Body Injection
Carburetor Flange: 4150 Square Bore
Injector Size: 100 lb/hr (x4)
Maximum NA Horsepower: 650 HP
Boost Capability: Up to 575 HP
Finish: Black
Control Interface: Bluetooth (mobile device)
Fuel Pump Type: Drop-In EFI Pump
Fuel System Type: Returnless
 Power Distribution Module: Not Included

Please Note:
 - This kit does not include a Power Distribution Module (PDM).
 - Additional fuel system components may be required depending on vehicle configuration.
 - Sniper 2 EFI software does not support nitrous control.
 - Always verify fuel system capacity and application compatibility prior to ordering.