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performance tuning shops and engine builders can find all that they need to properly tune their bikes
high-output competition subwoofer
**Additional Details:**
This 4" aluminum tube offers a 25% larger diameter
TWIN TUNER II 07-21 XL & 01-11 TC W/ 36 PIN Category_Default Category/SLED/Polaris/Matryx 9R performance tuning shops and engineThe 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.
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