IMSA GT classes are former classifications of sports prototypes in sports car racing competing in the IMSA GT Championship. The classes were used at different, overlapping times during the period from 1971 to 1998, over which the championship ran.

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Grand Touring Prototype (GTP) The newest and most technologically advanced Prototype race car took to the track for the first time in 2023, featuring a common hybrid powertrain for all entries that takes kinetic energy gained in braking and stores it in batteries for later use when needed.

Jan 8, 2024 · Starting at the Mobil 1 Twelve Hours of Sebring in March, the GTP field will include a new contender for the final four rounds of the Michelin Endurance Cup. Like BMW, Cadillac and Porsche, Lamborghini is planning a dual IMSA/WEC attack with its new SC63 prototype.

23 hours ago · Racing Penske Makes It 3 For 3 in GTP as IMSA Season Looks All Roger All the Time The Porsche 963s qualified third and fourth but took the lead on pit stops and never looked back.

Jan 24, 2023 · This year, the preseason test was more important than most, as there's a new kind of race car, called the GTP, competing in the Rolex 24 in 2023.

22 hours ago · The Porsche Penske Motorsport (6) GTP, left, and Acura Meyer Shank Racing (93), right, speed through the track during the IMSA sports car Grand Prix of Long Beach race on Saturday, April 12, 2025.

Wayne Taylor Racing (WTR) and Cadillac Racing announced today their complete driver lineup for the two-car Grand Tour Prototype (GTP) factory program set to take the green flag at the Rolex 24 At DAYTONA, the kickoff of the 2025 IMSA …

Feb 5, 2023 · Hybrid power came to IMSA's top-class GTP prototype division this year, which changed the racing at the 2023 Rolex 24 at Daytona race dramatically. Four major automobile manufacturers chose...

Mar 16, 2025 · Aston Martin Valkyrie becomes the first GTP class car, derived from a road car, to record a points finish in top level endurance racing Valkyrie is the only hypercar to contest the world’s two premier sportscar series, IMSA and the FIA World Endurance Championship, in 2025