Unlock hidden power and drive like your Civic Si was meant to.

This FlashPro Online Custom Tune with Basemap is the fastest and most effective way to transform your 2006–2011 Honda Civic Si with proven gains in horsepower, torque, and throttle response.

Perfect for bolt-on builds, NA upgrades, or turbocharged setups—this tune is built specifically for your car and delivered 100% remotely.

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