Fuel Injector Clinic 540cc High Impedance Fuel Injector Set for LS3, LS7, L76, L92 & L99 Engines (IS303-0540H)
Upgrade the fueling performance of your GM Gen IV LS engine with the Fuel Injector Clinic IS303-0540H injector set. Designed for LS3, LS7, L76, L92, and L99 engines, this complete set of eight 540 cc high impedance injectors provides the precision, consistency, and drivability needed for naturally aspirated and boosted performance applications. Utilizing the latest injector technology, these ball and seat injectors deliver excellent linearity and superior short pulse width repeatability for dependable street manners and accurate tuning.
Every injector set is precisely flow matched to within 1% and each injector is individually serial numbered. A detailed flow sheet is included with every set, providing complete matching data for improved calibration accuracy. Plug and Play GM ECU calibration data is available from Fuel Injector Clinic. This kit includes injector pigtails for wiring conversion, while optional Plug and Play adapters are available separately for installers who prefer a no-cut installation.
Quick Specs
- Manufacturer: Fuel Injector Clinic
- Part Number: IS303-0540H
- Application: LS3, LS7, L76, L92, and L99 Engines
- Injector Quantity: Set of 8
- Injector Type: Saturated High Impedance (High-Z) Ball and Seat
- Flow Rate: 540 cc/min @ 43.5 PSI (3 Bar)
- Installation: Wiring conversion required
- Included: Injector pigtails
- Optional: Plug and Play wiring adapters available separately
- Flow Matching: Precision matched to within 1%
- 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: Individual injector flow sheet
- Included: All required O-rings for the factory application
- Warranty: 12 month manufacturer warranty
Features
- Designed for LS3, LS7, L76, L92, and L99 engine applications.
- Complete set of eight 540 cc high impedance injectors.
- Saturated ball and seat injector design.
- Latest Fuel Injector Clinic injector technology.
- Flow matched to within 1% for outstanding cylinder-to-cylinder consistency.
- Each injector is individually serial numbered.
- Includes detailed injector flow sheet.
- Excellent linearity and short pulse width repeatability.
- Outstanding idle quality and drivability.
- Plug and Play GM ECU calibration data available.
- Includes injector pigtails for wiring conversion.
- Optional Plug and Play adapters available separately.
- Includes all required O-rings for factory installation.
- Backed by a 12 month Fuel Injector Clinic manufacturer warranty.
Fitment
LS3 Engines
LS7 Engines
L76 Engines
L92 Engines
L99 Engines
FAQs
Do these injectors require wiring modifications?
Yes. The IS303-0540H includes injector pigtails for wiring conversion. Optional Plug and Play wiring adapters are available separately if you prefer not to cut or solder your factory harness.
Is tuning data available for these injectors?
Yes. Fuel Injector Clinic provides Plug and Play GM ECU calibration data to simplify tuning and help achieve excellent drivability.
Why Buy From Beefcake Racing?
Beefcake Racing is an Authorized Fuel Injector Clinic dealer, offering genuine FIC products backed by expert technical support, competitive pricing, and fast shipping. Whether you're upgrading a street-driven LS3 or building a serious forced induction LS platform, our experienced team can help you select the right injectors and supporting fuel system components.
Have questions about injector sizing or compatibility? Contact our team before placing your order.
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
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