The HKS F-CON iS is a cutting-edge piggy-back ECU designed specifically for the Subaru Legacy with the EJ20 engine from 2003 to 2006. This advanced system seamlessly connects to your stock ECU using a vehicle-specific harness, ensuring a hassle-free installation without any modifications. Whether you're upgrading your intake or exhaust or adjusting your boost levels, the F-CON iS offers precise fuel and ignition management, inheriting the robust features of the previous F-CON SZ model.
Users have noted significant improvements in engine response and tuning flexibility with the F-CON iS. Many have successfully utilized it to optimize their vehicle's performance after upgrading exhaust systems or increasing boost levels, making it a popular choice for enthusiasts looking to enhance their Subaru Legacy.
Other Part Numbers:
HKS #hks4202-RA003
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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.