Not CARB Approved, does not ship to California

The Twin Tuner II has all of the features of the Twin Tuner and also allows retarding of the spark timing up to 10° to help prevent pre-ignition knocking.

The user interface consists of up/down pushbuttons and a bright daylight readable LED display to select and change the fuel trim and spark retard in the RPM and throttle position ranges required by most applications.

Not legal for use in California on pollution controlled vehicles - Check local laws before installing

PROP 65 WARNING: Cancer and/or reproductive harm - www.P65Warnings.ca.gov