Laurin Heinrich stuffed his Porsche 963 up the inside of Earl Bamber’s Cadillac in Turn 5 on the final lap at Laguna Seca and drove away. The margin was 0.758 seconds. The significance was considerably larger.
JDC-Miller MotorSports, a privateer operation running under a Mustang Sampling livery that echoed its 2021 Sebring-winning DPi Cadillac, just became the first independent team to win in IMSA’s GTP class. The factory squads — Porsche Penske, Action Express Cadillac, Acura Meyer Shank — have owned this category since its inception. Sunday in Monterey, they didn’t.
Heinrich, who was shuffled from the dominant Porsche Penske No. 7 to JDC’s No. 5 entry ahead of last month’s Long Beach sprint, has now won three GTP races in 2025 split across two different Porsche 963 chassis. His co-driver Tijmen van der Helm picked up his first IMSA victory. The pair’s best prior result together was a third at Indianapolis in 2024.
The race itself was a slow-burning fuel strategy chess match that detonated in the final 15 minutes. Tom Blomqvist led overall in the No. 60 Acura ARX-06 but couldn’t stretch his fuel window far enough. He pitted from a 27.8-second lead but spent 36 seconds on pit lane, emerging fourth. That handed the fight to Bamber, who looked set to cruise home until Heinrich arrived with other plans.
“The strategy was amazing. The car was incredible, such a joy to drive,” Heinrich told NBC Sports. He’s now won every race he’s entered at Laguna Seca, a streak that includes back-to-back GTD Pro victories with AO Racing. The man simply owns that corner of the Monterey Peninsula.
Porsche Penske, meanwhile, posted their worst results of the season. The No. 6 and No. 7 entries finished sixth and seventh respectively, the No. 6 nursing nose damage from contact with the No. 65 Ford Mustang GT3 during the race. The team that won Daytona and Sebring couldn’t crack the top five at a track where their former driver stole the show for someone else.
Ford Racing broke through in GTD Pro, with Frederic Vervisch and Christopher Mies delivering the No. 65 Mustang GT3’s first win of the year. They held off Nick Catsburg and Tommy Milner in the Corvette Racing Z06, while Philip Eng and Marco Wittmann rounded out the podium in their BMW M Team WRT entry. The GTD Pro class saw its own fuel drama as Nick Tandy, Alexander Sims, Ben Barnicoat, and Connor De Phillippi all splashed with minutes remaining, scrambling the order.
Wayne Taylor Racing captured GTD with the No. 45 Lamborghini Huracán GT3 Evo2, Danny Formal and Trent Hindman benefiting from a fortunate traffic split that gave Hindman clean air over the final lap. The class leaders who gambled long — Callum Ilott in the Wright Motorsports Porsche and Scott Andrews in the van der Steur Aston Martin — came up short and pitted with 10 minutes left.
Four rounds into the season, the GTP landscape looks different than anyone projected. Heinrich is emerging as the series’ most dangerous driver regardless of which car he’s sitting in. JDC-Miller, a team that hadn’t won anything in IMSA since that Sebring triumph five years ago, just proved the Porsche 963 platform can deliver at the sharp end even without a factory budget backing it.
The privateer door is open. Whether anyone else walks through it depends on whether the factories can close it back up before Watkins Glen.
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