The HKS FCD (Fuel Cut Defencer)is an electronic device that overrides the high-boost fuel cut function of your vehicle's ECU. The FCD will widen the area of high boost which will allow the vehicle to attain much higher boost settings, as well as faster response. To install the FCD, simply follow the instruction guide provided and splice the appropriate wires into the factory ECU harness.
WARNING: Due to the nature of this product, higher than recommended or unsafe boost levels may be attained by installation and use of this product and may cause detonation or serious engine damage. Because this unit is a sophisticated electrical device and can easily be damaged by improper installation, these units are sold "AS-IS", and are non-returnable for ANY reason. We strongly suggest that this unit be installed by a qualified professional who is familiar with this product.

| Part Number | Description | Price | |
| 4501-RN003 | NISSAN 300ZX TURBO (ALL YEARS) (TYPE H) | $110.00ea | |
| 4501-RM003 | TOYOTA SUPRA TURBO 87-91 (TYPE K3) | $110.00ea | |
| 4501-RA002 | TOYOTA SUPRA TURBO 93+ (STD/NORMAL TYPE) | $110.00ea | |
| 4501-RA002 | TOYOTA MR2 TURBO 91-96 (STD/NORMAL TYPE) | $110.00ea | |
| 4501-RA002 | MAZDA RX7 TURBO 93+ (STD/NORMAL TYPE) | $110.00ea | |
| 4501-RA002 | MAZDA RX7 TURBO 86-94 (STD/NORMAL TYPE) | $110.00ea | |
| 4501-RM003 | DSM TURBO 89-94 (TYPE K3) | $110.00ea |