XDI LT4+65% DI Fuel Injectors for GM V8 LT-Engines

XDI LT4+65% DI Fuel Injectors for GM V8 LT-Engines

Our 100% XDI manufactured and tested DI-Injectors are designed for the new GM LT series engines. With a 65% increase in flow over stock LT4 injectors, these supply the required fuel flow for high horsepower applications without the need for auxiliary fuel systems. These injectors are based on the original GM LT4 injector, which makes them a perfect drop in solution. Most of the ECU Injector characteristics stay the same.
Every Injector gets tested at 100bar and 200bar on OEM testing equipment at XDI. Every set gets flow matched to within ±1% at 100bar and 200bar fuel pressure !!!

Testing on fully instrumented engine (8x O2, 8x EGT) done by Katech Inc. has shown unequaled results in terms of cylinder distribution, repeatability and stability at pressures up to 2900psi. Tuning changes required are minimal, offsets and current driver parameters stay the same. The injectors are E85 compatible.

Straight E85, 1200whp GDI only !!!

no meth, no PFI, no extra ECUs, no wiring, full control, full OBD Diagnostics.

Please ask for dealer discounts and bundle pricing with our XFP3600 belt driven fuel pump

Price: $499 per injector, taking pre-orders now

Available on backorder




High horsepower GM Gen V V8 and V6 direct injection engines including LT5, LT4, LT1, L86, L83 and LV3
E85 conversions of GM Gen V V8 and V6 engines
High Revving applications (9000+ rpm)

2014-  C7 Corvette LT1
2015-  C7 Z06 Corvette LT4
2019-  C7 ZR1 Corvette LT5
2016-  Camaro SS LT1
2017-  Camaro ZL1 LT4
2016-  CTS-V LT4
2014-  Silverado and Sierra with 4.3L LV3, 5.3L L83 and 6.2L L86 engines
2015-  Suburban, Tahoe, Yukon and Escalade with 5.3L L83 and 6.2L L86 engines

static flow rate: 29.2g/sec

– 91% more flow than production LT1/L86 injectors (15.3g/sec)
– 65% more flow than production LT4 injectors (17.7g/sec)
– E85 compatible

maximum pressure:
200bar / 2900psi (tested rock solid on engine dyno)

Needs upgraded low pressure and high pressure fuel pump to extract full potential.

Combinations and Power Potential:
Perfect for 1200+ whp applications on full E85 (Turbos, F1X, overdriven F1A) in combination with our XFP3600 belt driven fuel pump.
Perfect for high rpm applications with custom cam lobe and the LT4 OEM or LPE HPFP.
Also good for reduced injection window on 800-1000whp applications with our 40% XDI cam lobe for the LT4 OEM-HPFP.
Good for >1500whp on race gas with turbos in combination with our XFP3600 belt driven fuel pump.

For all other applications our brand new XDI LT4+30% DI Fuel Injectors are sufficient.

Tuning Support:  HPT

Supporting Material

coming soon

California Proposition 65

 Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are:

lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and
arsenic and chromium from chemically treated lumber.

Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.