Improves horsepower and throttle response for a more dynamic driving experience
Enhances fuel efficiency by up to 5 mpg
Non-permanent design allows for safe, reversible use
Maintains everyday drivability without compromising reliability
Summarized by Shop
Unlock your Audi S4's hidden performance with the CircIQ tuning module. Designed for easy installation and everyday drivability, CircIQ helps improve horsepower, throttle response, and fuel efficiency without permanent modifications. Experience smoother acceleration, stronger performance, and potential gains of up to 35 horsepower and up