EFI Conversion, Sniper Quadrajet, Master Set

Universal Sniper Quadrajet Spreadbore EFI Master Conversion Kit by Holley®

Self-learning spreadbore EFI supports up to 500 HP on compatible Quadrajet intake manifolds.

This Holley® Sniper Quadrajet electronic fuel-injection system is designed to mount in place of a Rochester Quadrajet four-barrel carburetor on a compatible spreadbore intake without adding a square-bore adapter. The throttle-body assembly retains a carburetor-style appearance while using four 100-lb/hr fuel injectors, an integrated controller and an oxygen-sensor feedback loop that refines fueling as you drive. A 3.5-inch color touchscreen supports initial calibration, live engine-data monitoring and adjustment without a laptop. The system is rated for up to 500 horsepower on naturally aspirated engines and offers ignition-timing control when used with compatible supporting ignition components. Fuel inlet arrangement and finishes depend on the selected model. This master-kit configuration includes the matched external fuel pump, filters, fuel hose and return-line installation hardware needed to deliver high-pressure fuel to the throttle body. Confirm tank return routing and any fuel-pressure-regulator requirements before installation.

• For Rochester Quadrajet spreadbore intake • Up to 500 naturally aspirated horsepower • Four 100-lb/hr fuel injectors • Self-learning ECU and wideband oxygen feedback • 3.5-inch setup and monitoring touchscreen • Fuel pump, filters and return hardware included in master package