Chevy LT4

•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
•2014-2019 C7 Corvette (LT1)
•2015-2019 C7 Z06 Corvette (LT4)
•2016-2022 Camaro SS (LT1)
•2016-2019 CTS-V (LT4)
•2020-2024 CT5-V Black Wing (LT4)
•2017-2023 ZL1 Camaro (LT4)
•2014-2023 Silverado and Sierra with 4.3L LV3, 5.3L L83 and 6.2L L86 engines *Not compatible with 6mm shaft injectors
•2015-2023 Suburban, Tahoe, Yukon and Escalade with 5.3L L83 and 6.2L L86 engines *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.

Stanadyne/Katech Goliath High-Pressure Fuel Pump

Developed in partnership with Stanadyne, the Goliath High-Pressure Fuel Pump is a premium, modular solution designed to overcome the fuel flow limitations of the stock Gen V LT mechanical fuel pump, enabling higher power output. Tested on Katech’s in-house engine dyno, the Goliath Fuel Pump supports over 1,500 hp on gasoline and 1,300 hp on E85.

• 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
• Compatible with Cam Lifts Over 8.00mm

This pump provides a reliable, high-performance fueling solution for extreme builds, ensuring efficient fuel delivery and high RPM stability.

Lingenfelter Big Bore Direct Injection Fuel Pump for GM Gen V V8 Engines

The mechanical fuel pump flow has been a significant limitation in aftermarket power increases for GM direct injection V8 engines. The Lingenfelter Big Bore fuel pump addresses this by providing a substantial boost in fuel flow capacity over the stock LT1/L86 and LT4 pumps, expanding performance potential for these engines. With a 12.0 mm bore, the Big Bore pump offers over 30% more flow than the stock L86 & LT1 pumps and nearly 10% more than the LT4 pump. Paired with the LPE GT35 camshaft (7.85 mm fuel pump lobe), it delivers 40% more flow than a stock LT4 pump with a stock camshaft.

Key Specifications:

• Fuel Flow Capability: Supports over 1400 horsepower (0.52 BSFC) for turbocharged LT4 engines on VP Motorsports 109 fuel
• Bore Size: 12.0 mm
• DLC-Coated Bore and Piston for durability
• Compatibility: Works with stock LT1 and LT4 lobes and aftermarket higher-lift fuel pump lobes
  • Note: Some aftermarket higher-lift camshaft designs may require a lash cap for camshaft base circle compensation
  • Note: Certain aftermarket camshaft designs may require a higher load spring to maintain lifter control
• Hot Tested: 100% of pump assemblies are hot-tested for performance and functionality
• Individual Serial Numbers for traceability
• Max Recommended Operating Pressure: 15 MPa (2175 PSI)
• Low Side Fuel Pressure Requirement: 68 PSI or greater

Benefits:

• Increased Fuel Flow: Enables higher power levels without auxiliary fuel systems
• Stock Appearance
• E85 Compatibility
• Enhanced Flow Potential: Can be paired with higher-lift lobes for further flow increases

Fuel Pump Lobe Sizes:

• Stock LT1: 5.70 mm
• Stock LT4: 6.00 mm
• Lingenfelter GT35 L210287515: 7.85 mm
• Lingenfelter GT35 L210200215: 6.5 mm

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.

Specifications

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 / 3200 psi

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 / 3200 psi

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 / 2800 psi

Note: Due to their 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.

Power Potential and Recommended Combinations (LT4 +30%)

• 750–850 WHP on Full E85: Use with minimum +32% cam lobe on LT4 OEM HPFP (up to 3200 psi) or Katech Goliah/LPE HPFP.
• 1000 WHP on Blends or Race Gas (Turbo): Pair with minimum +32% cam lobe on LT4 OEM HPFP or Katech Goliah/LPE HPFP.
• 1000 WHP on Full E85 (TVS2650, Whipple, F1A): Requires +32% cam lobe on LT4 OEM HPFP or Katech Goliah/LPE HPFP and methanol injection, or with our XFP3200 belt-driven fuel pump.
• 1200 WHP on Race Gas (Turbo): Pair with our XFP3600 belt-driven fuel pump.

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 LPE Big Bore pump or Katech Goliath.

Important: The LPE Big Bore + LT4 +70% injectors will not meet fueling demands for setups with a 2650 TVS or Whipple blower on E85. In these cases, we recommend our XFP3200 + 70% injectors or supplemental fueling (methanol, PFI) around peak torque.

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Tuning Support: Compatible with HP Tuners and standalone ECUs

All performance figures assume a fully supported setup.