Fuel Injector Clinic 1000cc High Impedance Fuel Injector Set (1999-2006 GM 4.8L / 5.3L / 6.0L Truck Engines) - IS304-1000H
Upgrade the fuel system on your 1999-2006 GM 4.8L, 5.3L, or 6.0L truck engine with the Fuel Injector Clinic IS304-1000H High Impedance Fuel Injector Set. This complete set of eight performance injectors flows 1000cc/min (85 lb/hr) at 43.5 PSI (3 Bar) and 1040cc/min (100 lb/hr) at the factory 58 PSI (4 Bar) fuel pressure. Built using the latest injector technology, these injectors offer outstanding linearity, exceptional short pulse width repeatability, and excellent drivability, making them ideal for high-performance naturally aspirated, supercharged, turbocharged, and E85-capable builds.
The IS304-1000H injector set is precisely matched using Fuel Injector Clinic's proprietary Data Match Technology. Every injector is individually serial numbered and includes a comprehensive Data Match Sheet with injector-specific flow and latency data, providing one of the most accurate injector matching systems available. Plug and Play GM ECU calibration data is also available from Fuel Injector Clinic to simplify tuning on supported GM engine management systems.
This injector set includes PGTUSC8 injector pigtails for wiring harness conversion. If you prefer not to modify the factory harness, optional PADPUtoGM8 Plug and Play adapters are available separately for a no-cut, no-solder installation. Fuel Injector Clinic specifies this connector conversion because it utilizes brand-new, unused injectors instead of remanufactured or core-program injectors, providing superior reliability and long-term performance.
Quick Specs
- Part Number: IS304-1000H
- Application: 1999-2006 GM 4.8L, 5.3L, and 6.0L truck engines
- Injector Quantity: 8
- Injector Flow Rate: 1000cc/min (85 lb/hr) at 43.5 PSI (3 Bar)
- Injector Flow Rate: 1040cc/min (100 lb/hr) at OE 58 PSI (4 Bar)
- Injector Type: High impedance (saturated)
- Includes PGTUSC8 injector pigtails
- Optional PADPUtoGM8 Plug and Play adapters available
- Plug and Play GM ECU calibration data available
- Fuel Injector Clinic Data Match Technology
- Each injector individually serial numbered
- Detailed Data Match Sheet included
- Flow tested at 43.5 PSI (3 Bar)
- Tested using CF-16B calibration fluid at 90 degrees Fahrenheit
- Application-specific O-rings included
- Lifetime warranty against manufacturing defects
Features
- Designed specifically for 1999-2006 GM 4.8L, 5.3L, and 6.0L truck engines
- Flows 1000cc/min (85 lb/hr) at 43.5 PSI and 1040cc/min (100 lb/hr) at OE 58 PSI fuel pressure
- Latest high impedance injector technology delivers precise and consistent fuel delivery
- Outstanding linearity and superior short pulse width repeatability
- Fuel Injector Clinic Data Match Technology ensures exceptional injector-to-injector consistency
- Each injector is individually serial numbered with an included Data Match Sheet
- Plug and Play GM ECU calibration data available for supported applications
- Includes PGTUSC8 injector pigtails for connector conversion
- Optional PADPUtoGM8 Plug and Play adapters allow installation without cutting or soldering
- Brand-new injectors eliminate the concerns associated with remanufactured core injectors
- Application-specific O-rings included for proper installation
- Excellent idle quality, drivability, and simplified tuning
- Backed by Fuel Injector Clinic's lifetime warranty against manufacturing defects
Fitment
- 1999 GM 4.8L Truck Engine
- 2000 GM 4.8L Truck Engine
- 2001 GM 4.8L Truck Engine
- 2002 GM 4.8L Truck Engine
- 2003 GM 4.8L Truck Engine
- 2004 GM 4.8L Truck Engine
- 2005 GM 4.8L Truck Engine
- 2006 GM 4.8L Truck Engine
- 1999 GM 5.3L Truck Engine
- 2000 GM 5.3L Truck Engine
- 2001 GM 5.3L Truck Engine
- 2002 GM 5.3L Truck Engine
- 2003 GM 5.3L Truck Engine
- 2004 GM 5.3L Truck Engine
- 2005 GM 5.3L Truck Engine
- 2006 GM 5.3L Truck Engine
- 1999 GM 6.0L Truck Engine
- 2000 GM 6.0L Truck Engine
- 2001 GM 6.0L Truck Engine
- 2002 GM 6.0L Truck Engine
- 2003 GM 6.0L Truck Engine
- 2004 GM 6.0L Truck Engine
- 2005 GM 6.0L Truck Engine
- 2006 GM 6.0L Truck Engine
Installation and Connector Information
This injector set requires changing the injector connectors on your engine wiring harness. The included PGTUSC8 pigtails can be soldered onto the factory harness, or optional PADPUtoGM8 Plug and Play adapters can be purchased separately for a true plug-and-play installation without cutting or soldering.
Fuel Injector Clinic specifies this connector conversion because it uses brand-new, unused injectors instead of remanufactured or core-program injectors, helping ensure maximum reliability, consistency, and long service life.
FAQs
Do these injectors require modifying the factory wiring?
Yes. The included PGTUSC8 pigtails replace the factory injector connectors. Optional PADPUtoGM8 Plug and Play adapters are available if you prefer not to modify the factory wiring harness.
Is calibration data available for GM ECUs?
Yes. Fuel Injector Clinic provides Plug and Play GM ECU calibration data for supported GM engine management systems, helping simplify tuning while maintaining excellent drivability.
Why Buy From Beefcake Racing?
Beefcake Racing proudly supplies genuine Fuel Injector Clinic fuel injectors backed by competitive pricing, fast shipping, and expert technical support. Whether you're building a turbocharged street truck, a supercharged performance build, or a dedicated race application, our experienced team can help you select the proper injectors and supporting fuel system components.
Questions about injector sizing or fuel system upgrades?
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
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