Fuel Injector Clinic 1650cc High Impedance Fuel Injector Set for LS3, LS7, LSA, L76, L92 & L99 Engines (IS303-1650H)
Take your GM Gen IV LS build to the next level with the Fuel Injector Clinic IS303-1650H injector set. Designed for LS3, LS7, LSA, L76, L92, and L99 engine applications, this complete set of eight saturated high impedance fuel injectors delivers the fuel capacity required for serious naturally aspirated, turbocharged, and supercharged combinations while maintaining outstanding idle quality and street manners. Utilizing the latest injector technology, these injectors provide exceptional linearity, precise short pulse width control, and the consistency required for accurate tuning.
The IS303-1650H features direct drop-in installation using the factory-style electrical connector, eliminating the need for wiring modifications or adapter harnesses. Every injector is dynamically matched using Fuel Injector Clinic's proprietary Data Match Technology, individually serial numbered, and supplied with a comprehensive Data Match Sheet containing detailed flow and latency information. Plug and Play GM ECU calibration data is also available directly from Fuel Injector Clinic to simplify ECU tuning.
Constructed with a stainless alloy valve, these injectors are compatible with pump gasoline, E85, Q16, VP Import, FTW, and other MTBE oxygenated race fuels. Fuel Injector Clinic considers the 1650cc injector to be the largest high impedance injector compatible with all race fuels, while still delivering excellent drivability for street-driven vehicles.
Quick Specs
- Manufacturer: Fuel Injector Clinic
- Part Number: IS303-1650H
- Application: LS3, LS7, LSA, L76, L92, and L99 Engines
- Injector Quantity: Set of 8
- Injector Type: Saturated High Impedance (High-Z)
- Flow Rate: 1650 cc/min (160 lb/hr) @ 43.5 PSI (3 Bar)
- Flow Rate: 1900 cc/min (180 lb/hr) @ 58 PSI (4 Bar)
- Installation: Direct drop-in factory-style connector
- Connector: No plug conversion required
- 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
- Fuel Compatibility: Pump gasoline, E85, Q16, VP Import, FTW, and other MTBE oxygenated race fuels
- Valve Construction: Stainless alloy valve
- 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.
- 1650 cc/min (160 lb/hr) flow rate at 43.5 PSI (3 Bar).
- 1900 cc/min (180 lb/hr) flow rate at the OE 58 PSI (4 Bar) fuel pressure.
- Direct drop-in factory connector installation.
- No wiring modifications or plug conversion required.
- Latest Fuel Injector Clinic injector technology.
- Matched using proprietary Data Match Technology.
- Each injector is individually serial numbered.
- Includes a comprehensive Data Match Sheet with flow matching and latency values.
- Excellent short pulse width control for superior idle quality and drivability.
- Compatible with pump gasoline, E85, Q16, VP Import, FTW, and other MTBE oxygenated race fuels.
- Stainless alloy valve construction for outstanding fuel compatibility.
- 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 IS303-1650H uses factory-style electrical connectors, making it a true drop-in installation with no wiring changes or adapter harnesses required.
What fuels are these injectors compatible with?
The stainless alloy valve construction allows compatibility with pump gasoline, E85, Q16, VP Import, FTW, and other MTBE oxygenated race fuels while maintaining excellent idle quality and drivability.
Why Buy From Beefcake Racing?
Beefcake Racing is an Authorized Fuel Injector Clinic dealer, providing 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 knowledgeable team can help you select the ideal injectors and supporting fuel system components.
Need assistance planning your complete fuel system? Contact our experienced team before placing your order.
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
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