Take your Mazda RX-7 FD3S to the next level with the HKS F-CON iS, a state-of-the-art piggy-back ECU designed specifically for fuel and ignition management. This advanced system seamlessly connects to your stock ECU using a vehicle-specific harness, ensuring a hassle-free installation without any modifications.
The F-CON iS retains the essential fuel and ignition control functions from the previous F-CON SZ model, while introducing new capabilities that allow for the collection of OBD II diagnostic data. This feature is particularly useful for fine-tuning your settings after upgrading intake or exhaust components or adjusting boost levels.
Users have praised the HKS F-CON iS for its straightforward installation and significant impact on engine performance. Many have shared their experiences of improved throttle response and smoother power delivery after integrating this ECU into their RX-7. With the added OBD II diagnostics, tuning becomes even more precise, allowing enthusiasts to maximize their vehicle's potential.
Other Part Numbers:
HKS #hks4202-RZ007
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1993-2002 Mazda RX-7 |
RX-7 | 1993-2002 |

Since its beginning, HKS has been committed to providing well-integrated, reliable,and environmentally sound performance systems. Mr. Hasegawa's strong leadership, engineering genius, creativity and willingness to listen to customers are the pillars of the company's success. Monitoring consumer reaction and input on issues pertaining to material quality, external appearance, sound quality, and of course, performance, HKS stays in tune with automotive enthusiasts' needs. Moreover, HKS' products are designed to be user friendly for easy installation.
HKS provides a warranty to the original purchaser of HKS exhaust systems against defects in materials and workmanship for a period of one year. The warranty applies only for vehicle specific exhaust systems. Other products such as metal catalyzers, front pipes, exhaust manifolds, and center pipes are not covered.