In 2003, Ed Susman found himself learning to tune in order to improve the performance of his Subaru WRX while a student at University. Soon, friends within the Subaru community were becoming happy customers, and the rest is history.

In 2008, Ed decided to expand Equilibrium Tuning into a Full Service Installation, Tuning, and Maintenance Facility in Fairfield, CA. Since opening the shop, Equilibrium Tuning has experienced consistent growth and continues to improve and develop innovative services and products. We now support Volkswagen, Audi, BMW, Porsche and Toyota other platforms in addition to Subaru. 

Following the Covid-19 Pandemic, EQT made the decision to close down the service department, and no longer take on vehicle installation and maintenance work. We continue to work on providing world-class calibrations for a variety of platforms, and our R&D department continues to design and manufacture lots of in-house hardware.

Effective 8 July 2021, Equilibrium Tuning can again sell certain EO approved Cobb AccessPorts to residents of California.

If you receive an error at check out regarding shipping rates not being available, it is most likely due to the fact that your shipping address is California and you are attempting to purchase a restricted product. Local pick up is not an option.

Existing California customers will still receive support from EQT, however, we are unable to ship these unapproved AP's to California.While we don't want to infringe on or restrict anyone's ability to enjoy their car or modify it in a way they see fit, We must respect Cobb's decision and comply with the law.Again, my most sincere apologies to those of you who reside in California

Equilibrium Tuning cares greatly about our customers and their safety, in doing so we're providing you with the following;

California’s Proposition 65 entitles California consumers to special warnings for products that contain chemicals known to the state of California to cause cancer and birth defects or other reproductive harm if those products expose consumers to such chemicals above certain threshold levels.

We are providing the following warning for products linked to this page:

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

For more information visit www.P65warnings.ca.gov