Fuel Injector Clinic 650cc Fuel Injector Set - High Z (is176-0650h) - 2004-2006 Subaru STI / 2005-2006 Legacy GT
Upgrade the fuel delivery on your top-feed-converted 2004-2006 Subaru STI or 2005-2006 Legacy GT with the Fuel Injector Clinic is176-0650h 650cc High-Z fuel injector set. This four-injector package uses saturated, high-impedance Ball & Seat injectors engineered for excellent linearity and short pulse width repeatability. Combined with Fuel Injector Clinic's proprietary Data Match Technology, these injectors deliver the precise, consistent fueling needed for a properly tuned performance Subaru while providing additional capacity beyond the factory fuel system.
Important fitment note: The is176-0650h injector set only fits the original tumblers when used with the FIC RL STi top-feed fuel rail conversion. Verify that your STI or Legacy GT has the required FIC top-feed conversion before ordering.
Each injector is individually serial numbered and precisely matched using FIC Data Match Technology, with detailed flow matching and latency information supplied on the included Data Match Sheet. Fuel Injector Clinic flow tests and rates these injectors at 43.5 PSI (3 Bar) with fuel at 90 degrees F using CF-16B calibration fluid. PGTUSC4 solder-in pigtails are included, or optional PADPUtoD4 plug-and-play adapters can be used to connect the injectors without cutting or soldering the factory wiring harness.
Specifications
- Manufacturer: Fuel Injector Clinic
- Part Number: is176-0650h
- Flow Rate: 650cc/min
- Injector Quantity: 4
- Injector Type: Saturated / high impedance Ball & Seat
- Impedance: High-Z / high impedance
- Matching: Fuel Injector Clinic Data Match Technology
- Flow Test Pressure: 43.5 PSI (3 Bar)
- Flow Test Fuel Temperature: 90 degrees F
- Calibration Fluid: CF-16B
- Included Pigtails: PGTUSC4
- Optional Plug-and-Play Adapters: PADPUtoD4
- O-Rings: Included as required for the listed application
- Required Fuel Rail Conversion: FIC RL STi top-feed fuel rail conversion
- Warranty: Lifetime warranty against failure caused by defects in original manufacture
Features
- Complete set of four 650cc/min performance fuel injectors
- Saturated, high-impedance Ball & Seat injector design
- Excellent linearity and short pulse width repeatability
- Fuel Injector Clinic proprietary Data Match Technology
- Each injector is individually serial numbered
- Included Data Match Sheet provides detailed flow matching and latency information
- Superior short pulse width control supports precise idle and part-throttle fueling
- State-of-the-art matching helps provide predictable tuning and strong drivability
- Flow tested and rated at 43.5 PSI (3 Bar)
- Testing performed with fuel at 90 degrees F using CF-16B calibration fluid
- Includes PGTUSC4 solder-in pigtails
- Optional PADPUtoD4 adapters provide plug-and-play connection to the stock harness
- Includes O-rings required for the listed application
- Uses brand-new, unused injectors rather than remanufactured or core-program injectors
- Lifetime warranty against failure caused by defects in original manufacture
650cc Performance With Precise Fuel Control
The is176-0650h provides increased fuel capacity for modified STI and Legacy GT applications without giving up the precise low-pulse control needed for good drivability. Excellent linearity and short pulse width repeatability help the ECU accurately meter fuel during idle and part-throttle operation, while the 650cc/min flow rate provides additional fueling capacity as performance modifications increase engine fuel demand.
Injector consistency is critical to a clean performance calibration. Fuel Injector Clinic combines precise matching with detailed injector characterization to provide tuners with predictable fuel delivery across the set. This balance of additional capacity and accurate control makes the is176-0650h an excellent upgrade for compatible top-feed-converted Subaru applications that need more fueling capability while retaining street-friendly behavior.
Fuel Injector Clinic Data Match Technology
Fuel Injector Clinic precisely matches each is176-0650h set using its proprietary Data Match Technology. Every injector is individually serial numbered, and the results are documented on the included Data Match Sheet with detailed flow matching and latency information. This injector-specific data gives tuners the information needed for accurate ECU calibration and helps maximize the benefits of the injectors' linearity and short pulse width control.
Fuel Injector Clinic flow tests and rates these injectors at 43.5 PSI (3 Bar) with fuel at 90 degrees F using CF-16B calibration fluid. Combined with precise matching and tight manufacturing tolerances, this testing helps provide consistent fuel delivery, predictable tuning characteristics, and strong drivability across the operating range.
Wiring and Installation
The is176-0650h requires an injector plug conversion. PGTUSC4 solder-in pigtails are included with the injector set and can be installed in place of the existing injector connectors on the vehicle wiring harness. For an installation that does not require cutting or soldering the factory harness, optional PADPUtoD4 plug-and-play adapters can be purchased instead.
Fuel Injector Clinic uses brand-new, unused injectors for its performance applications rather than relying on remanufactured or core-program injectors. The set includes the O-rings required for the listed application. If your vehicle uses additional aftermarket or unusual fuel-system components, injector fitment should be verified before ordering.
Fitment
- 2004 Subaru STI with FIC RL STi top-feed fuel rail conversion
- 2005 Subaru STI with FIC RL STi top-feed fuel rail conversion
- 2006 Subaru STI with FIC RL STi top-feed fuel rail conversion
- 2005 Subaru Legacy GT with FIC RL STi top-feed fuel rail conversion
- 2006 Subaru Legacy GT with FIC RL STi top-feed fuel rail conversion
FAQs
Will the FIC is176-0650h injectors fit a stock 2004-2006 Subaru STI or 2005-2006 Legacy GT fuel system?
No. These injectors only fit the original tumblers when used with the FIC RL STi top-feed fuel rail conversion. Confirm that the required FIC top-feed conversion is installed before ordering.
Do the FIC is176-0650h injectors require changes to the factory injector wiring?
Yes. PGTUSC4 solder-in pigtails are included for replacing the existing injector connectors. Optional PADPUtoD4 plug-and-play adapters can be used if you prefer to install the injectors without cutting or soldering the factory harness.
Why Buy Fuel Injector Clinic Injectors From Beefcake Racing?
Beefcake Racing is your source for Fuel Injector Clinic injectors and supporting fuel-system components for high-performance Subaru builds. Whether you are upgrading a street-driven STI or Legacy GT or building a more serious turbo combination, our team can help you select the right fueling components for your setup. Questions about Fuel Injector Clinic is176-0650h? Email sales@beefcakeracing.com or call 1-855-827-7223.
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