 Nyorai kupfuurira kweiyi ndima - Busch anewo nhau dzinovava naKevin Harvick. Vakamhanyira mumwe nomumwe pamitambo yemitambo uye mumigwagwa yeGo-Kart sevana vechiduku uye vakagovana kakawanda kutanga muna 2001. Nharo dzavo dzakasvika pakakwirira zvikuru muchirimo cha2006. KuBristol muna 2006, Harvick akapedza musangano wevatyairi uye kubvunzurudzwa kwake kusati kwaitika mujaho achiseka Busch zvichitevera kupopotedzana kuAtlanta. Busch haana kuteerera kutuka kwake uye akakunda mujaho wacho, nepo Harvick akapedzisira ava wechipiri. Apo Harvick akabvunzurudzwa mushure mokunge mujaho wapera akati akanga achifara nekuguma kwake asi akati akanga akasuruvara zvikuru kuona Busch achikunda, asati adaidza Busch whiner. Richard Childress gare gare akakumbira ruregerero nokuda kwemashoko omutyairi wake uye NASCAR yakapa Harvick nyevero kuti arege kunanga Busch. Muna 2007 apo Harvick akakunda mijaho miviri Busch akatonga zvakadai sa2007 Daytona 500, uye 2007 All-Star Race, Busch akataura chinhu chimwe chetecho pamusoro paHarvick: Ndinongovenga kurasikirwa naKevin. Nenzira inoshamisa, muna 2014, vatyairi vose vari vaviri vakabva mumapoka avo ekare kuenda kuStewart-Haas Racing, Busch naHarvick vakava vatambi pamwe chete naStewart. 