A misfiring engine or loss of spark could simply be a bad spark plug cap. Replace it quickly and easily with this cap. The cap will simply thread into your original coil wire and you are back in business. Replaces Polaris part number 3086463 and 3087037. Fits the following models: 2004-05 Polaris ATP 330 2000-02 Polaris Xpedition 325 2003-13 Trailboss 330 2008-13 Trailblazer 330