Fuel Injector Clinic 1000cc High Impedance Fuel Injector Set for LS3, LS7, LSA, L76, L92 & L99 Engines (IS303-1000H)
Support serious horsepower with the Fuel Injector Clinic IS303-1000H fuel injector set. Designed specifically for LS3, LS7, LSA, L76, L92, and L99 engine applications, this complete set of eight saturated high impedance injectors provides the fuel delivery needed for demanding naturally aspirated, supercharged, and turbocharged combinations while maintaining excellent idle quality and street manners. Built using Fuel Injector Clinic's latest injector technology, these injectors offer exceptional linearity and short pulse width control for precise fueling throughout the RPM range.
Each IS303-1000H injector set is dynamically matched using Fuel Injector Clinic's proprietary Data Match Technology, ensuring outstanding cylinder-to-cylinder consistency. Every injector is individually serial numbered and includes a comprehensive Data Match Sheet containing detailed flow matching and latency values for accurate ECU calibration. These injectors feature direct drop-in factory plug fitment, eliminating the need for wiring modifications, while Plug and Play GM ECU calibration data is available directly from Fuel Injector Clinic.
Quick Specs
- Manufacturer: Fuel Injector Clinic
- Part Number: IS303-1000H
- Application: LS3, LS7, LSA, L76, L92, and L99 Engines
- Injector Quantity: Set of 8
- Injector Type: Saturated High Impedance (High-Z)
- Flow Rate: 1000 cc/min (85 lb/hr) @ 43.5 PSI (3 Bar)
- Flow Rate: 1040 cc/min (100 lb/hr) @ 58 PSI (4 Bar)
- Installation: Direct drop-in factory plug fitment
- Matching Technology: Fuel Injector Clinic Data Match Technology
- Flow Testing: Tested at 43.5 PSI (3 Bar) using CF-16B calibration fluid at 90 degrees Fahrenheit
- ECU Support: Plug and Play GM ECU calibration data available from Fuel Injector Clinic
- Included: Comprehensive Data Match Sheet
- Included: All required O-rings for the factory application
- Warranty: Lifetime manufacturer warranty
Features
- Designed for LS3, LS7, LSA, L76, L92, and L99 engine applications.
- Complete set of eight saturated high impedance fuel injectors.
- 1000 cc/min (85 lb/hr) flow rate at 43.5 PSI (3 Bar).
- 1040 cc/min (100 lb/hr) flow rate at the OE 58 PSI (4 Bar) fuel pressure.
- Direct drop-in factory plug fitment.
- No wiring modifications or adapter harnesses required.
- Latest Fuel Injector Clinic injector technology.
- Matched using Fuel Injector Clinic's proprietary Data Match Technology.
- Each injector is individually serial numbered.
- Includes a comprehensive Data Match Sheet with flow matching and latency values.
- Excellent linearity and superior short pulse width control.
- Outstanding idle quality and drivability.
- Plug and Play GM ECU calibration data available.
- Includes all required O-rings for factory installation.
- Backed by Fuel Injector Clinic's lifetime manufacturer warranty.
Fitment
LS3 Engines
LS7 Engines
LSA Engines
L76 Engines
L92 Engines
L99 Engines
FAQs
Do these injectors require wiring modifications?
No. The IS303-1000H utilizes direct drop-in factory plug fitment, allowing installation without modifying the factory electrical connectors.
What does Fuel Injector Clinic Data Match Technology provide?
Every injector is dynamically matched, individually serial numbered, and supplied with a detailed Data Match Sheet containing flow and latency information to help achieve accurate ECU calibration and consistent fuel delivery.
Why Buy From Beefcake Racing?
Beefcake Racing is an Authorized Fuel Injector Clinic dealer, offering genuine FIC fuel system components backed by expert technical support, competitive pricing, and fast shipping. Whether you're upgrading a street-driven LS3 or building a high-horsepower LSA-powered race car, our experienced team can help you select the proper injectors and supporting fuel system upgrades.
Need help selecting the right injector size for your build? Contact our knowledgeable team before placing your order.
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
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