Application
- High horsepower GM Gen V V8 and V6 direct injection engines including LT4, LT1, L86, L83 and LV3
- E85 conversions of GM Gen V V8 and V6 engines
Vehicle Applications
- C7 Corvette (LT1): 2014–2019
- C7 Z06 Corvette (LT4): 2015–2019
- Camaro SS (LT1): 2016–2022
- CTS-V (LT4): 2016–2019
- CT5-V Blackwing (LT4): 2020–2024
- ZL1 Camaro (LT4): 2017–2023
- Silverado and Sierra with 4.3L LV3, 5.3L L83 and 6.2L L86 engines: 2014–2023 *Not compatible with 6mm shaft injectors
- Suburban, Tahoe, Yukon and Escalade with 5.3L L83 and 6.2L L86 engines: 2015–2023 *Not compatible with 6mm shaft injector
*Global B ECUs may require extra tuning on a case-by-case basis as we learn more about new models. We do not accept returns due to tuning difficulties, but we’re happy to assist with any technical inquiries.
RGX HPFP Specifications
NEWStanadyne/XDI RGX High-Pressure Fuel Pump
The RGX High-Pressure Fuel Pump is a whole new generation, developed in collaboration with Stanadyne, represents a cutting-edge, modular solution engineered to address the fuel flow limitations of the stock Gen V LT mechanical fuel pump, enabling significantly higher power outputs.
The RGX Fuel Pump demonstrates exceptional performance, supporting over 1,500 horsepower on gasoline and 1,300 horsepower on E85 fuel. These results were achieved exclusively with direct injection (DI) on C16 fuel & turbos with additional testing yielding over 1,300 horsepower on full E85.
It is important to note that these figures reflect engine dyno results and are not directly representative of wheel horsepower (whp) due to drivetrain and supercharger losses. Turbocharged setups have achieved 1,100–1,150 whp, while supercharged configurations with a 2650 supercharger have reached up to 1,000 whp. These benchmarks serve as guidelines, with actual performance varying based on specific drivetrain and forced-induction setups.
RGX Features
- Direct Bolt-In for all GM Gen V LT engines
- 12mm Bore Size for enhanced fuel flow
- Up to 220 bar operating pressure
- Enhanced Spring Design for superior stability at high RPMs
- Improved Volumetric Efficiency over OEM and competing pumps
What’s New: RGX vs Goliath
| Feature | Goliath | RGX |
|---|---|---|
| Plunger Architecture | Large-plunger | Improved large-plunger |
| Max Cam Lift | Up to 8.2mm (optimized plunger and retainer) | |
| Spring & Spring Seat | — | New design |
| Internal Flow Path | — | Optimized |
| High-RPM Output | — | Consistent high-pressure output at Xtreme RPM |
| LT2 Fitment | — | Inlet fitting relocated to fit LT2 engines |
This pump provides a reliable, high-performance fueling solution for extreme builds, ensuring efficient fuel delivery and high RPM stability.
One example for a combination with not enough preload is Aftermarket LTR block and LME valley cover plus a 38% fuel lobe on the camshaft. This one needs a skinnier RGX base plate (-0.060). This is an option to purchase during checkout.
Injector Specifications
These high-flow injectors are designed for performance builds demanding increased fuel delivery. They offer significant flow improvements over production LT1/L86 and LT4 injectors and are E85 compatible.
LT4 +30% Injectors
- Static Flow Rate: 23 g/sec (2000 cc/min @ 100 bar)
- 50% more flow than production LT1/L86 injectors (15.3 g/sec)
- 30% more flow than production LT4 injectors (17.7 g/sec)
- Max Pressure: 221 bar / 3,200 psi
- Modifications: No extra spray hole on tip, internals modified.
LT4 +50% Injectors
- Static Flow Rate: 26.6 g/sec (2300 cc/min @ 100 bar)
- 50% more flow than production LT4 injectors (17.7 g/sec)
- Max Pressure: 221 bar / 3,200 psi
- Modifications: One extra spray hole on tip & internals modified.
LT4 +70% Injectors
- Static Flow Rate: 30.1 g/sec (2600 cc/min @ 100 bar)
- 70% more flow than production LT4 injectors (17.7 g/sec)
- Max Pressure: 193 bar / 2,800 psi
- Modifications: One extra spray hole on tip & internals further modified.
Note: Due to the LT4 +70% Injectors large size, these injectors may not deliver stock-like drivability, especially on pump gas. Manual transmission cars may experience pressure overshoots after shifting, potentially causing misfires. Reducing pressure may be necessary.
Requirements
- Fuel System Upgrades: Requires upgraded low-pressure and high-pressure fuel pumps to reach full potential.
For Higher Output Applications
- XDI LT4 +70% Injectors are recommended for naturally aspirated (e.g., Nitro-Methane), low-RPM turbo applications, or centrifugal superchargers when combined with the RGX HPFP.
- Tuning Support: Compatible with HP Tuners and standalone ECUs
All performance figures assume a fully supported setup.
