Fuel Injector Clinic 365cc High Impedance Fuel Injector Set for Small Block Chevy Gen II Engines (IS300-0365H)
Upgrade your Small Block Chevy Gen II fuel system with the consistent fuel delivery and precise injector matching of the Fuel Injector Clinic IS300-0365H 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-style 58 PSI (4 Bar) fuel pressure. Designed for performance-minded street and track combinations, these injectors deliver excellent linearity, repeatable low-pulse operation, and dependable drivability across a wide range of engine speeds and load conditions.
The IS300-0365H set includes PGTUSC8 injector connector pigtails for wiring-harness conversion. For a cleaner installation without cutting or soldering the original harness, optional PADPUtoJ8 Plug and Play adapters can be added separately. This connector conversion is required because Fuel Injector Clinic uses brand-new, unused injectors instead of relying on remanufactured injectors or core-exchange components. That approach helps reduce the potential reliability concerns associated with previously used injector bodies.
Every injector set is precisely flow matched to within 1 percent. Each injector is individually numbered, and its results are recorded on the detailed flow sheet included with the set. The injectors are tested and rated at 43.5 PSI (3 Bar) with fuel maintained at 90 degrees Fahrenheit using CF-16B calibration fluid. Tight manufacturing tolerances and superior short pulse width control help make these injectors easier to tune while supporting smooth idle quality and responsive street manners.
Quick Specs
- Part Number: IS300-0365H
- Application: Small Block Chevy Gen II 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
- Flow Matching: Precisely matched to within 1 percent
- Connector Pigtails Included: PGTUSC8
- Optional Plug and Play Adapters: PADPUtoJ8
- Wiring harness connector conversion required unless optional adapters are used
- Each injector individually numbered
- Detailed injector flow sheet included
- Flow tested using CF-16B calibration fluid
- Test Pressure: 43.5 PSI (3 Bar)
- Test Fuel Temperature: 90 degrees Fahrenheit
- Application-specific O-rings included
- Lifetime warranty against defects in original manufacture
Features
- Designed for Small Block Chevy Gen II engine applications
- Flows 365cc/min at 43.5 PSI and 420cc/min at OE 58 PSI fuel pressure
- High impedance design works with compatible saturated injector drivers
- Excellent injector linearity for predictable fuel delivery
- Superior short pulse width repeatability supports smooth idle and part-throttle operation
- Precisely flow matched to within 1 percent for consistent cylinder-to-cylinder fueling
- Each injector is individually numbered and documented on the included flow sheet
- Includes PGTUSC8 pigtails for injector harness plug conversion
- Optional PADPUtoJ8 adapters provide a Plug and Play alternative to cutting or soldering
- Uses brand-new, unused injectors rather than remanufactured or core-program injectors
- Includes the O-rings required for the intended factory-style application
- Backed by Fuel Injector Clinic's lifetime warranty against original manufacturing defects
Fitment
- Small Block Chevy Gen II engine applications requiring a set of eight high impedance fuel injectors
- Factory-style and compatible aftermarket fuel systems designed for this injector configuration
Installation and Connector Information
This injector set does not use the original injector plug found on the applicable vehicle wiring harness. The included PGTUSC8 pigtails can be soldered into the harness to replace the existing injector connectors.
For an installation that does not require cutting or soldering, add the optional PADPUtoJ8 Plug and Play adapters. These adapters connect the injector plugs to the existing harness connectors while leaving the original wiring intact.
Fuel Injector Clinic uses this connector arrangement so it can supply brand-new, unused injectors rather than remanufactured injectors sourced through a core program. This helps provide a fresh, consistent foundation for performance fuel delivery and long-term reliability.
FAQs
Do the IS300-0365H injectors require a wiring change?
Yes. The included PGTUSC8 pigtails must be installed in place of the existing injector plugs. Optional PADPUtoJ8 Plug and Play adapters can be purchased separately to complete the connector conversion without cutting or soldering the factory harness.
What flow rate will these injectors provide at 58 PSI?
At the OE-style fuel pressure of 58 PSI (4 Bar), the IS300-0365H injectors flow approximately 420cc/min or 40 lb/hr per injector. Their standard Fuel Injector Clinic rating is 365cc/min or 35 lb/hr at 43.5 PSI (3 Bar).
Why Buy From Beefcake Racing?
Beefcake Racing supplies genuine Fuel Injector Clinic products backed by experienced performance support, competitive pricing, and fast shipping. Our team can help you confirm injector sizing, connector requirements, and supporting fuel-system components before you order, especially when working with aftermarket fuel rails or custom engine combinations.
Questions about injector fitment or wiring adapters?
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
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