The 1985 Champion Spark Plug 400 was a Winston Cup (now Nextel Cup) race that occured at Michigan International Speedway on August 11, 1985. Bill Elliott won from the pole in dominating fashion, leading 90 of the 200 laps in route to a four-second victory on Darrell Waltrip. Elliott also added to his points lead, holding a 143-point edge on Waltrip. Stats