Stanadyne RGX Race Grade Xtreme High-Pressure GDI Fuel Pump – GM LT

Purpose-built for high-horsepower GM LT GDI applications, the Stanadyne RGX Race Grade Xtreme high-pressure fuel pump features a 12mm high-lift plunger and race-focused fuel delivery design.

Features

• Supports 800–1,400+ horsepower builds (application dependent)
• 200 bar fuel pressure capability
• Up to 8,000 engine RPM
• Gasoline, E10–E85 and M15 compatible
• 45% more flow than SP1250 at 3,500 pump RPM, 5.7mm lift and 5 bar inlet pressure
• 34% more flow than SP1550 at 3,500 pump RPM, 6.0mm lift and 5 bar inlet pressure
• Upgraded spring, retention system and optimized discharge passages

Specifications

Manufacturer: Stanadyne
Part number: 06728
Plunger: 12mm
Recommended lobe lift: 7.85mm (38%)
Maximum tested lobe lift: 8.2mm (42%)

GM LT Fitment

Designed for compatible GM Gen V LT direct-injection engines, including select LT1, LT2 and LT4 applications found in Corvette C7/C8, Camaro SS/ZL1 and Cadillac CTS-V. Vehicle model year, fuel system configuration, pump mounting and cam fuel-lobe compatibility must be verified before ordering. Contact Fuel Injector Connection to confirm fitment.

Critical Installation and Warranty Requirements

Direct bolt-in design requires proper installed-height measurement. Installed plunger preload must be 1.20–1.80mm (.047–.070 in). Lash caps are strictly prohibited. Improper preload can result in pump or engine failure. Installation should be performed by a qualified technician following the Stanadyne GX Pump Preload Measurement and Installation Guide (Specification 70640). Installation measurements must be submitted for warranty consideration at Stanadyne Installation Validation and Product Registration.

Download Stanadyne RGX Installation Guide (PDF)

Installation guide: Contact Fuel Injector Connection for the official Stanadyne RGX preload and installation PDF.