Stanadyne LT4 Gen 1 +61% High Performance Direct Injection Fuel Injector

Sold individually. Price is per injector.

Part number: 611661

Deliver additional fuel for high-horsepower LT applications while preserving the factory spray pattern and targeting. Each injector is manufactured from the ground up with precision laser-drilled nozzle technology.

Flow Capacity

• 61% greater flow than OEM LT4 injectors
• 88% greater flow than 2020–2023 LT2 injectors
• 116% greater flow than 2023+ LT2 small-stem injectors

Features

• Brand-new injector design
• Maintains OEM spray targeting
• FEA-validated design
• Compatible with gasoline and E85
• Designed for naturally aspirated, supercharged, and turbocharged engines
• OE-quality idle and drivability after proper calibration

Technical Specifications

• Injector tip diameter: 7.45 mm (OE)
• Nozzle holes: 6 (OE)
• Nozzle technology: precision laser drilled
• Spray pattern: same as OE
• Operating pressure: 220 bar
• Maximum fuel pressure: 280 bar

Installation and Calibration

Direct drop-in replacement for the OEM fuel rail and cylinder head in applicable applications. Calibration is required and is available through partners. Intended for GM Gen V+ (2014-up) engines requiring increased direct injection fuel capacity; confirm compatibility for your application before ordering.