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That depends on if you have stock headpipes with a catalytic converter. Assuming you do, we recommend the 2.25" baffle as the smallest option. They will flow a little better and will be louder than stock. The difference from stock will be noticeable but nothing like a full system. Please keep in mind that the headpipes will be where most of the restriction on flow/volume comes from.
In my opinion, on a bike with open headpipes, such as an 07 or 08 bagger, the 2.00 baffle will open it up and the sound difference will be night and day compared to stock. 2.00" is the most popular for use with open head pipes. 2.50" is most popular with cat equipped touring models and provides a nice increase in volume.
Last edited by Rush Racing Products; Jun 29, 2011 at 11:00 AM.
Reason: correction to information
I corrected some information in my first post. The 2.25" is the smallest baffle option recommended for your setup. It will be louder than stock by a descent amount.
-Ryan
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