TWIN TUNER II 07-21 XL & 01-11 TC W/ 36 PIN Category_Default Category/SLED/Polaris/Matryx 9R You can adjust the center

You can adjust the center of mass (up

This 4" aluminum tube offers a 25% larger diameter

high-output competition subwoofer

performance tuning shops and engine builders can find all that they need to properly tune their bikes

TWIN TUNER II 07-21 XL & 01-11 TC W/ 36 PIN Category_Default Category/SLED/Polaris/Matryx 9R You can adjust the centerThe 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.