Greg Biffle's former NASCAR rival, Kasey Kahne, has broken his silence regarding the racing legend's untimely death. "The impact of [losing] Greg has been immense," Kahne posted via X on Thursday, December 25. "From all the heartfelt posts I have read to our waiter tonight at dinner; everyone that knew him has lasting impressions. Greg was a consistently good person who treated everyone with respect and kindness. He had a big heart and he shared that and lived life the same way." The statement continued, "On track, his car control made him one of the best and I always enjoyed the competition.