Complex sentence: Following his victory at Daytona, Allison's car was inspected and was found to have lost its rear bumper, which appeared to have fallen off in a slight bump between two cars at the beginning of the race.
Split into simpler sentences: Following his victory at Daytona, Allison's car was inspected and was found to have lost its rear bumper. It appeared to have fallen off in a slight bump between two cars at the beginning of the race.