LT4 Fuel Injector & High-Pressure Fuel Pump Upgrade Kit The LT4 Fuel Injector & High-Pressure Fuel Pump Kit is the go-to fueling upgrade for Gen V LT1-powered vehicles looking to support increased horsepower, especially when running E85 or ethanol blends. Utilizing genuine ACDelco OEM LT4 components, this package delivers the additional fuel volume needed to safely support higher horsepower combinations while maintaining OEM quality and reliability. One of the biggest limitations of the factory LT1 direct injection system is fuel capacity. As horsepower increases, the stock LT1 injectors and high-pressure fuel pump quickly reach their limits, particularly on E85 where fuel demand is significantly higher. Upgrading to LT4 injectors and a matching LT4 high-pressure fuel pump is one of the most effective ways to increase fueling capacity and support future performance modifications. Whether you’re installing a camshaft, ported heads, supercharger, or preparing for additional upgrades, the LT4 fueling package provides a proven foundation for reliable power. Features Genuine ACDelco OEM LT4 fuel injectors Genuine ACDelco OEM LT4 high-pressure fuel pump Increased fueling capacity over factory LT1 components Ideal for E85 and ethanol-blend applications Proven upgrade for naturally aspirated and forced induction LT1 builds OEM fit, finish, and reliability Benefits Supports higher horsepower combinations Helps prevent fuel system limitations at higher power levels Maintains factory-quality performance and durability Excellent upgrade when installing a camshaft or other airflow modifications Applications Gen V LT1-powered Chevrolet performance vehicles Compatible with properly tuned LT1 fuel systems Important Notes Professional installation and custom tuning are required after installation. Additional fueling upgrades may be necessary depending on your horsepower goals and fuel type.
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