You'll need to get the right size replacement Dayco V belt. It's very important to match the new Dayco V belt shape with the old one. Sometimes the new Dayco V belt is a little bit different length. Many times the new Dayco V belt can be a bit different in length. This can be caused by stretching of the old belt. Most V belt systems have an adjustment that allows some tightening or loosening to make the belt fit. We sell Dayco V belt measuring devices. If a belt is more than a inch or so off chances are good it might not be acceptable.