Engine Rule for Daytona 500

Engine Rule for Daytona 500: the engine rule is a little different at Daytona 500 [just like qualifying] then the other 35 races, teams must run the same engine from Saturday's first practice session through the Budweiser Duel 150 mile qualifying races. If a team makes a change before the Duel, then it must start at the rear of the Duel 150 field. After the Duel 150 races, teams can make an engine change before the Happy Hour practice session. After that, if an engine change is made, the driver will start at the rear of the Daytona 500.