Complex sentence: One of the tracks that the Generation 6 car did not set a record at was Daytona International Speedway even though the car did not set a new track record Danica Patrick's was the one of closest since the restrictor plate era began.
Split into simpler sentences: One of the tracks that the Generation 6 car did not set a record at was Daytona International Speedway. Even though the car did not set a new track record, Danica Patrick's was the one of closest since the restrictor plate era began.