LONG POND, Pa. — The Nos. 11 and 18 cars of Joe Gibbs Racing, which had finished first and second hours earlier, were disqualified following Sunday’s NASCAR Cup Series event at Pocono Raceway.

RELATED: Official race results

Initially, Denny Hamlin had sailed to victory from the pole position for his third win of the year, with Kyle Busch right behind him finishing second in the No. 18. The ruling after post-race inspection, though, meant Chase Elliott was declared the official winner of the M&M’s Fan Appreciation 400 after initially finishing third. Tyler Reddick moved up to second, Daniel Suárez third, Christopher Bell fourth and Kyle Larson fifth.

Michael McDowell, Martin Truex Jr., Bubba Wallace, Erik Jones and Austin Dillon made up the top 10 finishing order.

NASCAR Cup Series Managing Director Brad Moran announced the front fascia on both JGR entries was the source of the issues leading to their disqualification.

“There was some issues discovered that affect aero of the vehicle. The part was the front fascia,” Moran explained Sunday. “And there really was no reason why there was some material that was somewhere that it shouldn’t have been, and that does basically come down to a DQ.”

Moran confirmed both vehicles were loaded into a NASCAR hauler and will be taken back to the sanctioning body’s R&D center for further evaluation.

Joe Gibbs Racing will have the opportunity to appeal the penalty by noon on Monday, July 25.

“We were shocked to learn of the infraction that caused our two cars to fail NASCAR’s post-race technical inspection,” team owner Joe Gibbs said in a statement. “We plan to review every part of the process that led to this situation.”

Moran said Sunday’s discoveries in post-race inspection do not currently warrant any further penalties to the infracting teams.

“We saw enough that the DQ was warranted and we are bringing the vehicles back for further evaluation,” Moran said. “So we will look much closer at both vehicles, but as of right now, no, we are hopefully not going to find anything else. But we are going to inspect them further when we get back to the R&D Center.”

Sunday’s finding is the first instance of a race winner in the NASCAR Cup Series being disqualified since 1960, when Emanuel Zervakis’ victory at Wilson (NC) Speedway was thrown out because of an oversized fuel tank. Joe Weatherly declared winner of that race.

There have been three winners whose cars were disqualified post-race since 2019, when NASCAR implemented harsher post-race inspection penalties: Kyle Busch in 2020 at Texas in the NASCAR Xfinity Series (Austin Cindric was declared the winner); Denny Hamlin in 2019 at Darlington in the NASCAR Xfinity Series (Cole Custer was declared the winner); and Ross Chastain in 2019 at Iowa Speedway in the Truck Series (Brett Moffitt was declared the winner).

Moran believes this Sunday’s DQ was, in part, the result of a tighter rule book with the series’ move to the Next Gen vehicle.

“It’s unfortunate. We don’t want to be here talking about this,” Moran said. “We just saw a great race. The last thing we want to do is meet here afterwards and talk about this problem. But the teams and the owners and everybody is well aware that this new car was going to be kept with some pretty tight tolerances, and there’s some areas that all the teams are well aware that we cannot be going down the path that we had in the past with the other car.

“So it is partly to do with the new car and the rules have tightened up. Everyone has to abide by our new rules, which everybody’s well aware of.”

Hamlin led 21 of the 160 laps in total, including the final 18 circuits around the 2.5-mile Pennsylvania track. Busch led a race-high 63 laps. They were relegated to the last two spots on the 36-driver results sheet.

Staff contributed to this report.