Description
The FiTech Rebel LS 500HP EFI Short Cathedral Intake & 340 LPH Kit (76688) is a comprehensive solution for enhancing the performance of your LS engine. This master kit provides all the essential components for a complete electronic fuel injection upgrade, including a short cathedral intake manifold, a high-flow in-tank fuel pump, and all necessary sensors. Designed for engines producing up to 500 horsepower, this system offers improved fuel atomization and precise engine control. It features multi-port injection and speed density (Map-N) metering, ensuring optimal performance across various operating conditions. This kit is compatible with gasoline, alcohol, methanol, and flex fuel, offering versatility for different fuel setups.
KEY FEATURES AND BENEFITS:
- Designed for LS series engines with cathedral port compatibility.
- Supports up to 500 horsepower, enhancing engine performance.
- Includes a high-flow in-tank fuel pump (340 LPH) for reliable fuel delivery.
- Multi-port injection for improved fuel atomization.
- Speed density (Map-N) metering for precise engine control.
- Compatible with power adders like boost and nitrous oxide.
- Complete kit includes ECU, sensors, and wiring harness for straightforward installation.
- Supports multiple fuel types: gasoline, alcohol, methanol, and flex fuel.
SPECIFICATIONS:
- Maximum Horsepower: 500 HP
- Injection Style: Multi-port
- Timing Control Compatible: Yes
- Power Adder Compatible: Yes (Boost/Nitrous oxide)
- ECU Included: Yes
- Fuel Pump Included: Yes (In-tank, 340 LPH)
- Transmission Controller Included: No
- Metering Style: Speed density (Map-N)
- Intake Manifold Included: Yes (Short Cathedral)
- Intake Material: Aluminum
- Intake Finish: Black Anodized
- Throttle Body Mounting Flange: GM LS2 4-bolt
- Venturi Diameter: 92 mm
- Airflow Rate: 1250 cfm
- Injector Size: 36 lbs./hr
- Fuel Type: Alcohol, Gasoline, Methanol, Flex
- Compatibility: LS Series Engines
HOW TO USE:
- Preparation: Disconnect the vehicle’s battery. Remove the existing intake manifold and fuel system components.
- Fuel Pump Installation: Install the in-tank fuel pump, ensuring proper connections and secure placement.
- Intake Manifold Installation: Mount the FiTech short cathedral intake manifold onto the engine, securing it with the provided hardware.
- Throttle Body and Sensor Installation: Attach the throttle body and install the MAP, IAT, and TPS sensors.
- Injector Installation: Install the fuel injectors into the intake manifold, connecting them to the fuel rails.
- Wiring Harness Connection: Connect the wiring harness to the ECU and all sensors, following the provided diagrams.
- ECU Setup: Mount the ECU in a suitable location and connect the necessary power and ground wires.
- Fuel Line Connection: Connect the fuel lines to the fuel pump and fuel rails, ensuring proper sealing.
- Calibration: Use the calibration module to set up the ECU according to your engine specifications.
- Testing: Reconnect the battery and start the engine, checking for fuel leaks and proper operation.
BENEFITS OF USING THE FITECH REBEL LS 500HP EFI SHORT CATHEDRAL INTAKE & 340 LPH KIT (76688):
- Enhanced Engine Performance: Increases horsepower output significantly.
- Improved Fuel Efficiency: Offers better atomization for optimized fuel delivery.
- Precise Engine Control: Achieved through speed density metering.
- Reliable Fuel Delivery: Ensured by the high-flow in-tank pump.
- Versatile Fuel Compatibility: Works with multiple fuel types for flexibility.
- Straightforward Installation: Comprehensive master kit simplifies setup.
- Ability to Handle Power Adders: Suitable for increased performance applications.
FEATURES:
- 92 mm single venturi throttle body for high airflow.
- Black anodized intake manifold finish for durability.
- Cast aluminum throttle body construction for strength.
- 36 lbs/hr fuel injectors for optimal fuel delivery.
- 1250 cfm airflow rating for enhanced engine breathing.
- Complete wiring harness with labeled connections for easy installation.
- Included oxygen sensor for real-time fuel adjustments.
- Included calibration module for user tuning and adjustments.
- Included MAP, IAT, and TPS sensors for accurate engine management.





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