An aftermarket UHF parasitic antenna kit and method for a mobile television antenna includes: a base having an engagement surface and an extending boom; rivet holes in the engagement surface that correspond in size and location to a corresponding number of holes in the bottom of the mobile television antenna; push rivets that engage the rivet and bottom holes to hold the base to the bottom of the mobile television antenna; base foot holes in the engagement surface and boom; resilient base feet that engage the base foot holes; and at least one parasitic antenna element connected to the boom.