When it comes to unlocking the true potential of your Gen V LT engine, fuel flow limitations can be a major roadblock. Even with a larger camshaft fuel lobe, and a low side boost-a-pump, it doesn't take long before the stock mechanical fuel pump, injectors and low-side pump struggle to keep up with the fueling needs from ported blowers, more boost, bolt ons, and E85. Although the benefits of Direct Injection are clear, taking your LT4 from a stock 550rwhp to the all to common 850rwhp + requires an investment in fuel volume availability. Luckily, the bright minds at Katech and XDI have created some turn-key solutions to help us meet our goals, and have generated power levels over 1,400 horsepower on gasoline and 1,200 horsepower on E85 in Katech’s rigorous in-house testing using these part combinations. Assembling into a single turn-key package helps us pass on up to a $1,100 savings when purchased together, allowing you to invest in tuning, tires, and other support mods!
Goliath High Pressure Fuel Pump;
The Goliath HPFP pump is the result of Stanadyne’s dedicated to blend OEM reliability with he performance demands of the aftermarket. As a globally recognized leader in fuel system technology, Stanadyne brought its vast expertise to the table to make this project a success, despite the technical challenges. The desire for higher flow and pressure led Stanadyne to develop a larger volume, 350-bar-capable pump for high-horsepower applications. This second-generation design is externally analogous to the original LT4 pump, but is fitted with a larger 12-milimeter plunger, has important internal modifications, and can accept up to an eight-millimeter plunger stroke which allows it to deliver up to 2,100 mm3/rev at 350 bar using a three-lobe camshaft with up to an eight-millimeter plunger stroke.
The Goliath starts life as an LT4 pump (which is currently the highest flowing OEM HPFP in the industry) but boasts a 12mm bore size and up to 350-bar operating pressure, making it the perfect match for aggressive higher HP builds. Its improved spring design ensures performance even at extreme RPMs. Unlike OEM and competing pumps that can struggle to keep up, the Goliath’s enhanced volumetric efficiency means it can keep up with cam lifts up to 8mm. Whether you’re on the track or tearing up the streets, the Goliath has your back.
Benefits;
-Direct bolt in for all GM Gen. V LT Engines.
-Larger 12mm bore size for 10-12% added volume.
-Reliability up to 250bar operating pressure.
-Improved spring design for superior high RPM stability.
-Improved Volumetric efficiency over OEM and competing pumps.
-Capable of up to 7.85mm camshaft lobe lift.
Katech Dual Drop In Low Side Fuel Pump;
Engineered to cater to the needs of Gen 6 Camaro and CTS V3 enthusiasts. This fuel pump module was meticulously designed to accommodate twin OEM grade high-output fuel pumps. This sealed drop-in fuel pump module retains ALL FACTORY FUNCTIONALITY, including low-level fueling performance which no other solution on the market has. You can operate this fuel system on the road course with factory low-level fuel performance unlike the aux pump and unsealed module solutions currently on the market.
Low Level Fuel Performance:
KAT-A7838 guarantees uncompromised performance under all conditions. By retaining the factory low-level fueling prowess and incorporating a venturi system, the fuel module ensures a continuous flow of fuel at all fuel levels, outpacing even the most demanding scenarios. Conquer lateral G-forces and unleash your vehicle's true potential with the assurance of consistent, full-throttle fueling. Note that this venturi system matches the performance of the OEM system, it is always suggested to keep your fuel level above E when possible in high performance driving scenarios.
Seamless Integration:
No drilling or bonding in fittings required. Experience a hassle-free installation and a seamless transition to enhanced fueling capabilities. The Katech Lowside Fueling Solution is engineered to be a true drop-in solution, retaining factory connections for a plug-and-play experience. The primary OEM grade high-output fuel pump is controlled by the factory FPCM.
Power Potential:
KAT-A7838 kit doubles your fuel capacity. With this configuration, our fuel module is poised to support 900rwhp on straight E85 in a factory returnless setup.
Leak-Free Design:Our solution guarantees a leak-free experience without any drilling or bonded fittings, preserving the integrity of your vehicle's fueling system.
Flexible Control: Exercise total control over the secondary pump using the control solution of your choice, or seamlessly integrate with our Katech twin pump PWM controller.
Factory Compatibility: Retain the essence of your factory setup with our solution, preserving the returnless fuel system, fuel level sender, EVAP functionality, and tank connections.
Requirements to Run this module:
To use the Katech Lowside Fueling Solution, a post-pump fuel filter (5-10µm, stainless or micro fiberglass, E85 rated) is required. Lots of good options available to you. We offer a universal option HERE.
The KAT-A7815 Plug & Play Controller/Harness allows for a seamless integration with no cutting or drilling required.
Kit includes:
KAT-A7763 - 2016+ Gen 6 Camaro/CTS-V3 Dual Fuel Pump Module
KAT-A7815 - PNP Harness/Controller
ABOUT XDI
For those who may not know… XDI’s success on many DI platforms could not have been possible without its founder, Uwe Ostmann’s 25 extensive years in motorsports and DI development. Uwe’s journey started in 2001 when he joined the talented team at Bosch Germany in August 2001. Use spent many of those early years developing Diesel High Pressure Nozzles and overcame many challenges related to tuning a common rail based high pressure fuel system.
After leading the Audi Le Mans LMP1 project for four years including fuel system and controls development and developing several key technologies at Bosch Motorsport in Germany, Uwe came to Bosch Motorsport USA in July 2012.
With Uwe’s talent and determination it didn’t take long before he took over the fuel system development of all OEM race projects based on GDI systems, including the Corvette C7.R, the Ford Daytona Prototype 3.5 EcoBoost and some others that cannot be mentioned in detail. He played a vital role in developing advanced combustion analysis systems and custom fuel systems and controls for several research projects with high pressure fuel systems up to 500bar / 7250psi.
In December 2014 Uwe quit Bosch Motorsport to create XDI. The first and only Bosch Motorsport Dealer and aftermarket supplier in the world with focus on high pressure GDI race projects. Since then Uwe has continued to grow XDI’s technology, effectiveness, and product line to not only support several race programs, on wheels and on water, endurance, drift and drag… but even more importantly… your street car!
XDI Fuel Injectors;
As you know, High-Flowing Fuel Injectors are a major component to High HP builds on a Direct Injected platform like the LT4. Although there are several manufactures to choose from, you can always count on Griffin-Motorsports carrying the highest quality and most trusted products on the market. Which is why we only offer XDI Fuel Injectors. Built upon the foundation of the original GM LT4 injector, they provide a straightforward drop-in installation with minimal adjustments to existing ECU injector characteristics. Each injector undergoes meticulous testing at 100bar and 200bar on OEM equipment at XDI, ensuring precise flow matching within ±0.5% for consistent performance. Tested on fully instrumented engines for superior cylinder distribution and stability at pressures up to 3000psi, these injectors are fully E85 compatible, making them a versatile choice for performance enthusiasts.
XDI 30+ Injector Specifications;
Static Flow Rate: 23 g/sec (2000 cc/min @ 100 bar)
Max Rail Pressure: 221 bar / 3000 psi
Fuel Compatibility: all known fuels, all Ethanol blends
Electric Connector: Bosch EV1
Driver Profile: XDI, tuning changes needed
Tuning Support: Standalone, HPT, MoTeC
Idle Stability: 0.8 ms at 20 bar
Static Flow Reference: 10 ms at 100 bar
WOT Performance and Stability: 6 ms at 200 bar
Tuning Support: Compatible with HP Tuners and standalone ECUs
XDI 50+ Injector Specifications;
Static Flow Rate: 26.6 g/sec (2300cc/min @ 100bar)
Max Rail Pressure: 221 bar / 3000 psi
Fuel Compatibility: all known fuels, all Ethanol blends
Electric Connector: Bosch EV1
Driver Profile: XDI, tuning changes needed
Tuning Support: Standalone, HPT, MoTeC
Idle Stability: 0.8 ms at 20 bar
Static Flow Reference: 10 ms at 100 bar
WOT Performance and Stability: 6 ms at 200 bar
Tuning Support: Compatible with HP Tuners and standalone ECUs
XDI 70+ Injector Specifications;
Static Flow Rate: 30.1 g/sec (2600cc/min @ 100bar)
Max Rail Pressure:193bar / 2800psi
Fuel Compatibility: all known fuels, all Ethanol blends
Electric Connector: Bosch EV1
Driver Profile: XDI, tuning changes needed
Tuning Support: Standalone, HPT, MoTeC
Idle Stability: 0.8 ms at 20 bar
Static Flow Reference: 10 ms at 100 bar
WOT Performance and Stability: 6 ms at 200 bar
Tuning Support: Compatible with HP Tuners and standalone ECUs. Note: Manual cars may experience significant pressure overshoots after shifting, which can cause misfires. Reducing pressure may be necessary in these cases.
Applications;
•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
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 straight E85. In these cases, we recommend the XFP3200 + 70% injectors or supplemental fueling (methanol, PFI) around peak torque. Planning for more than 1,000rwhp? Then ask us how we can help set you up with a TooHigh PSI Port System to supplement your Di System.
*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.
All performance figures are estimates only, assume a fully supported setup, and competent tuner who has experience tuning XDI products. Your results will vary. Final rail pressure should be determined by your tuner. Injectors are non-returnable.
INSTALLATION: As you may be aware, these are high tolerance, high performance parts that require a very detailed installation procedure. Not only do you need to make sure you have a quality fuel filter system of 10-microns or less, you need to ensure your pre-load for the HPFP and fastening procedure is followed perfectly. Please email us if you have any questions info@griffin-motorsports.com
PRE-LOAD and LASH “how to” video can be watched HERE
XDI - INSTALL INSTRUCTIONS CAN BE DOWNLOADED HERE.
Katech - INSTALL INSTRUCTIONS CAN BE DOWNLOADED HERE.
When it comes to unlocking the true potential of your Gen V LT engine, fuel flow limitations can be a major roadblock. Even with a larger camshaft fuel lobe, and a low side boost-a-pump, it doesn't take long before the stock mechanical fuel pump, injectors and low-side pump struggle to keep up with the fueling needs from ported blowers, more boost, bolt ons, and E85. Although the benefits of Direct Injection are clear, taking your LT4 from a stock 550rwhp to the all to common 850rwhp + requires an investment in fuel volume availability. Luckily, the bright minds at Katech and XDI have created some turn-key solutions to help us meet our goals, and have generated power levels over 1,400 horsepower on gasoline and 1,200 horsepower on E85 in Katech’s rigorous in-house testing using these part combinations. Assembling into a single turn-key package helps us pass on up to a $1,100 savings when purchased together, allowing you to invest in tuning, tires, and other support mods!
Goliath High Pressure Fuel Pump;
The Goliath HPFP pump is the result of Stanadyne’s dedicated to blend OEM reliability with he performance demands of the aftermarket. As a globally recognized leader in fuel system technology, Stanadyne brought its vast expertise to the table to make this project a success, despite the technical challenges. The desire for higher flow and pressure led Stanadyne to develop a larger volume, 350-bar-capable pump for high-horsepower applications. This second-generation design is externally analogous to the original LT4 pump, but is fitted with a larger 12-milimeter plunger, has important internal modifications, and can accept up to an eight-millimeter plunger stroke which allows it to deliver up to 2,100 mm3/rev at 350 bar using a three-lobe camshaft with up to an eight-millimeter plunger stroke.
The Goliath starts life as an LT4 pump (which is currently the highest flowing OEM HPFP in the industry) but boasts a 12mm bore size and up to 350-bar operating pressure, making it the perfect match for aggressive higher HP builds. Its improved spring design ensures performance even at extreme RPMs. Unlike OEM and competing pumps that can struggle to keep up, the Goliath’s enhanced volumetric efficiency means it can keep up with cam lifts up to 8mm. Whether you’re on the track or tearing up the streets, the Goliath has your back.
Benefits;
-Direct bolt in for all GM Gen. V LT Engines.
-Larger 12mm bore size for 10-12% added volume.
-Reliability up to 250bar operating pressure.
-Improved spring design for superior high RPM stability.
-Improved Volumetric efficiency over OEM and competing pumps.
-Capable of up to 7.85mm camshaft lobe lift.
Katech Dual Drop In Low Side Fuel Pump;
Engineered to cater to the needs of Gen 6 Camaro and CTS V3 enthusiasts. This fuel pump module was meticulously designed to accommodate twin OEM grade high-output fuel pumps. This sealed drop-in fuel pump module retains ALL FACTORY FUNCTIONALITY, including low-level fueling performance which no other solution on the market has. You can operate this fuel system on the road course with factory low-level fuel performance unlike the aux pump and unsealed module solutions currently on the market.
Low Level Fuel Performance:
KAT-A7838 guarantees uncompromised performance under all conditions. By retaining the factory low-level fueling prowess and incorporating a venturi system, the fuel module ensures a continuous flow of fuel at all fuel levels, outpacing even the most demanding scenarios. Conquer lateral G-forces and unleash your vehicle's true potential with the assurance of consistent, full-throttle fueling. Note that this venturi system matches the performance of the OEM system, it is always suggested to keep your fuel level above E when possible in high performance driving scenarios.
Seamless Integration:
No drilling or bonding in fittings required. Experience a hassle-free installation and a seamless transition to enhanced fueling capabilities. The Katech Lowside Fueling Solution is engineered to be a true drop-in solution, retaining factory connections for a plug-and-play experience. The primary OEM grade high-output fuel pump is controlled by the factory FPCM.
Power Potential:
KAT-A7838 kit doubles your fuel capacity. With this configuration, our fuel module is poised to support 900rwhp on straight E85 in a factory returnless setup.
Leak-Free Design:Our solution guarantees a leak-free experience without any drilling or bonded fittings, preserving the integrity of your vehicle's fueling system.
Flexible Control: Exercise total control over the secondary pump using the control solution of your choice, or seamlessly integrate with our Katech twin pump PWM controller.
Factory Compatibility: Retain the essence of your factory setup with our solution, preserving the returnless fuel system, fuel level sender, EVAP functionality, and tank connections.
Requirements to Run this module:
To use the Katech Lowside Fueling Solution, a post-pump fuel filter (5-10µm, stainless or micro fiberglass, E85 rated) is required. Lots of good options available to you. We offer a universal option HERE.
The KAT-A7815 Plug & Play Controller/Harness allows for a seamless integration with no cutting or drilling required.
Kit includes:
KAT-A7763 - 2016+ Gen 6 Camaro/CTS-V3 Dual Fuel Pump Module
KAT-A7815 - PNP Harness/Controller
ABOUT XDI
For those who may not know… XDI’s success on many DI platforms could not have been possible without its founder, Uwe Ostmann’s 25 extensive years in motorsports and DI development. Uwe’s journey started in 2001 when he joined the talented team at Bosch Germany in August 2001. Use spent many of those early years developing Diesel High Pressure Nozzles and overcame many challenges related to tuning a common rail based high pressure fuel system.
After leading the Audi Le Mans LMP1 project for four years including fuel system and controls development and developing several key technologies at Bosch Motorsport in Germany, Uwe came to Bosch Motorsport USA in July 2012.
With Uwe’s talent and determination it didn’t take long before he took over the fuel system development of all OEM race projects based on GDI systems, including the Corvette C7.R, the Ford Daytona Prototype 3.5 EcoBoost and some others that cannot be mentioned in detail. He played a vital role in developing advanced combustion analysis systems and custom fuel systems and controls for several research projects with high pressure fuel systems up to 500bar / 7250psi.
In December 2014 Uwe quit Bosch Motorsport to create XDI. The first and only Bosch Motorsport Dealer and aftermarket supplier in the world with focus on high pressure GDI race projects. Since then Uwe has continued to grow XDI’s technology, effectiveness, and product line to not only support several race programs, on wheels and on water, endurance, drift and drag… but even more importantly… your street car!
XDI Fuel Injectors;
As you know, High-Flowing Fuel Injectors are a major component to High HP builds on a Direct Injected platform like the LT4. Although there are several manufactures to choose from, you can always count on Griffin-Motorsports carrying the highest quality and most trusted products on the market. Which is why we only offer XDI Fuel Injectors. Built upon the foundation of the original GM LT4 injector, they provide a straightforward drop-in installation with minimal adjustments to existing ECU injector characteristics. Each injector undergoes meticulous testing at 100bar and 200bar on OEM equipment at XDI, ensuring precise flow matching within ±0.5% for consistent performance. Tested on fully instrumented engines for superior cylinder distribution and stability at pressures up to 3000psi, these injectors are fully E85 compatible, making them a versatile choice for performance enthusiasts.
XDI 30+ Injector Specifications;
Static Flow Rate: 23 g/sec (2000 cc/min @ 100 bar)
Max Rail Pressure: 221 bar / 3000 psi
Fuel Compatibility: all known fuels, all Ethanol blends
Electric Connector: Bosch EV1
Driver Profile: XDI, tuning changes needed
Tuning Support: Standalone, HPT, MoTeC
Idle Stability: 0.8 ms at 20 bar
Static Flow Reference: 10 ms at 100 bar
WOT Performance and Stability: 6 ms at 200 bar
Tuning Support: Compatible with HP Tuners and standalone ECUs
XDI 50+ Injector Specifications;
Static Flow Rate: 26.6 g/sec (2300cc/min @ 100bar)
Max Rail Pressure: 221 bar / 3000 psi
Fuel Compatibility: all known fuels, all Ethanol blends
Electric Connector: Bosch EV1
Driver Profile: XDI, tuning changes needed
Tuning Support: Standalone, HPT, MoTeC
Idle Stability: 0.8 ms at 20 bar
Static Flow Reference: 10 ms at 100 bar
WOT Performance and Stability: 6 ms at 200 bar
Tuning Support: Compatible with HP Tuners and standalone ECUs
XDI 70+ Injector Specifications;
Static Flow Rate: 30.1 g/sec (2600cc/min @ 100bar)
Max Rail Pressure:193bar / 2800psi
Fuel Compatibility: all known fuels, all Ethanol blends
Electric Connector: Bosch EV1
Driver Profile: XDI, tuning changes needed
Tuning Support: Standalone, HPT, MoTeC
Idle Stability: 0.8 ms at 20 bar
Static Flow Reference: 10 ms at 100 bar
WOT Performance and Stability: 6 ms at 200 bar
Tuning Support: Compatible with HP Tuners and standalone ECUs. Note: Manual cars may experience significant pressure overshoots after shifting, which can cause misfires. Reducing pressure may be necessary in these cases.
Applications;
•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
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 straight E85. In these cases, we recommend the XFP3200 + 70% injectors or supplemental fueling (methanol, PFI) around peak torque. Planning for more than 1,000rwhp? Then ask us how we can help set you up with a TooHigh PSI Port System to supplement your Di System.
*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.
All performance figures are estimates only, assume a fully supported setup, and competent tuner who has experience tuning XDI products. Your results will vary. Final rail pressure should be determined by your tuner. Injectors are non-returnable.
INSTALLATION: As you may be aware, these are high tolerance, high performance parts that require a very detailed installation procedure. Not only do you need to make sure you have a quality fuel filter system of 10-microns or less, you need to ensure your pre-load for the HPFP and fastening procedure is followed perfectly. Please email us if you have any questions info@griffin-motorsports.com
PRE-LOAD and LASH “how to” video can be watched HERE
XDI - INSTALL INSTRUCTIONS CAN BE DOWNLOADED HERE.
Katech - INSTALL INSTRUCTIONS CAN BE DOWNLOADED HERE.
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