Fuel Injector Clinic 365cc High Impedance Fuel Injector Set (1999-2006 GM 4.8L / 5.3L / 6.0L Truck Engines) - IS304-0365H
Upgrade the fuel system in your 1999-2006 GM 4.8L, 5.3L, or 6.0L truck engine with the Fuel Injector Clinic IS304-0365H High Impedance Fuel Injector Set. This complete set of eight injectors flows 365cc/min (35 lb/hr) at 43.5 PSI (3 Bar) and 420cc/min (40 lb/hr) at the factory 58 PSI (4 Bar) fuel pressure. Designed using the latest injector technology, these injectors deliver excellent linearity, superior short pulse width repeatability, and smooth drivability, making them an excellent choice for naturally aspirated and mild forced induction performance applications.
The IS304-0365H 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 values, providing some of the most accurate injector matching 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 your factory harness, optional PADPUtoGM8 Plug and Play adapters are available separately, allowing installation without cutting or soldering. Fuel Injector Clinic specifies this connector conversion because it utilizes brand-new, unused injectors instead of remanufactured or core-program injectors, providing superior long-term reliability and consistent performance.
Quick Specs
- Part Number: IS304-0365H
- Application: 1999-2006 GM 4.8L, 5.3L, and 6.0L Truck Engines
- Injector Quantity: 8
- Injector Flow Rate: 365cc/min (35 lb/hr) at 43.5 PSI (3 Bar)
- Injector Flow Rate: 420cc/min (40 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 365cc/min (35 lb/hr) at 43.5 PSI and 420cc/min (40 lb/hr) at OE 58 PSI fuel pressure
- Latest high impedance injector technology provides precise and consistent fuel delivery
- Excellent 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 to provide 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 separately if you prefer not to modify the factory wiring harness.
Is GM ECU calibration data available?
Yes. Fuel Injector Clinic provides Plug and Play GM ECU calibration data for supported GM engine management systems, making tuning easier while maintaining excellent drivability and idle quality.
Why Buy From Beefcake Racing?
Beefcake Racing proudly offers genuine Fuel Injector Clinic fuel injectors backed by competitive pricing, fast shipping, and expert technical support. Whether you're refreshing a performance truck or building a boosted GM engine, our experienced team can help you select the proper injectors and supporting fuel system components for your combination.
Questions about injector sizing or installation?
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
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