If 2001's even use the chopper from an older siren, it would most likely be a Model 7 chopper. I really don't think the chopper is the exact size as a Model 3,5, or 7. Federal most likely kept their infamous chopper design while sizing it to properly run with the 6.5hp motor that they make. Also note that a Model 3 chopper is only 12 inches wide.dispatcherman wrote: ↑Fri Jan 24, 2020 3:13 amI agree about the dual toned sirens. There are dual toned model 3's and since the 2001 appears to use a model 3 chopper it would not be much of a stretch to make it happen. I also like asc 8 port sirens. The cool thing on test day is to drive over between Coon Rapids roundback 2001 and Andover's T128 and get the "8-12" port ambience!!
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