XDI High Flow LT4/LT5 Injectors (+65%) ONLY ONE SET
IN STOCK
Description
XDI +65% High-Flow LT4 / LT5 Direct Injection Fuel Injectors (Used – Dyno Time Only)
These XDI +65% high-flow direct injection fuel injectors are designed for high-horsepower GM Gen V LT applications where increased fuel delivery is required beyond factory limits. Engineered to support boosted and ethanol-based combinations, these injectors provide a substantial increase in fueling capacity over stock LT1, LT4, and L86 injectors.
This set is lightly used for dyno testing only, offering proven performance with minimal runtime. Ideal for high-performance builds requiring increased direct injection capacity.
Key Features
- +65% Increased Fuel Flow Over Stock LT4 Injectors
- Designed For High Horsepower Boosted And E85 Applications
- Compatible With OEM GM Gen V Direct Injection Systems
- Maintains Proper Spray Pattern And Atomization Characteristics
- Based On Modified OEM Injector Platform
- Proven Performance In High Load And Dyno-Tested Environments
What’s Included
- Complete Set Of XDI +65% LT4 / LT5 Direct Injection Fuel Injectors
- Used – Dyno Time Only
Vehicle Fitment
GM Gen V Direct Injection Engines (2014+)
- 2014–2019 Corvette C7 LT1
- 2015–2019 Corvette C7 Z06 LT4
- 2019 Corvette C7 ZR1 LT5
- 2016–2024 Camaro SS LT1
- 2017–2024 Camaro ZL1 LT4
- 2016–2019 Cadillac CTS-V LT4
- 2014+ Silverado / Sierra 4.3L LV3, 5.3L L83, 6.2L L86
- 2015+ Suburban / Tahoe / Yukon / Escalade 5.3L L83, 6.2L L86
Suitable for supercharged, turbocharged, and ethanol (E85) conversion applications when paired with the proper supporting fuel system.
Requirements
- Upgraded High-Pressure Fuel Pump (HPFP) Required
- Upgraded Low Side Fuel System Recommended
- Professional ECU Calibration Required
- Proper Injector Characterization Data Must Be Applied
Important Notes
- Used Condition – Dyno Time Only
- No Extended Run Time Or Street Use
- Only One Set Available
Why Choose Katech Engineering
Since 1977, Katech Engineering has developed and supported GM-based engines at the highest levels of motorsports, including endurance racing and professional competition. Every component offered is selected and validated to meet the demands of high-performance engine programs.
From fueling systems to complete race engines, Katech delivers proven performance backed by real-world results.
Technical information
– 50% more flow than production LT1/L86 injectors (15.3g/sec)
– 30% more flow than production LT4 injectors (17.7g/sec)
– E85 compatible
Maximum Pressure:
LT4 +30%:
220bar / 3200psi (tested rock solid on engine and roller dyno)
240bar / 3500psi (under perfect conditions, no pressure pulsations)
LT4 +70%:
193bar / 2800psi
3000psi if you accept the risk of misfire, no single overshoot past 3000psi as this will for sure cause misfires.
Requirements:
Needs upgraded low pressure and high pressure fuel pump to extract full potential.
Combinations and Power Potential (LT4 +30%):
Perfect for 750-850whp on E85, if combined with a minimum +32% cam lobe for the LT4 OEM-HPFP (up to 3200psi) or the LPE HPFP.
Good for 1000whp on blends or race gas with turbos, if combined with a minimum +32% cam lobe for the LT4 OEM-HPFP (up to 3200psi) or the LPE HPFP.
Good for 1000whp applications on full E85 (TVS2650, Whipple, F1A) if combined with a minimum +32% cam lobe for the LT4 OEM-HPFP (up to 3200psi) or the LPE HPFP and meth injection.
Good for 1000whp applications on full E85 (TVS2650, Whipple, F1A) in combination with our XFP3200 belt driven fuel pump.
Good for 1200whp on race gas with turbos in combination with our XFP3600 belt driven fuel pump.
For higher output applications our brand new XDI LT4+70% DI Fuel Injectors are available.
These work good with the LPE big bore pump on NA (e.g. Nitro-Methane), Turbo (low boost at low rpm) or centrifugal superchargers.
Details
- KAT-GS-0007
- KAT-GS-0007
- Katech Engineering
- New
Shipping Information
- Item Requires Shipping
- 3.0 lbs.
- W4.0000” x H3.0000” x L7.0000”
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