The team made the announcement on Tuesday ahead of the start of a two-day test with the Lexus RC F GT3 it hopes to campaign next season, assuming it is granted entry slots.
Toyota's luxury brand Lexus has been linked to a presence in the new LMGT3 class with the existing RC F for some time as it continues development of a next-generation GT3 model based on the GR GT3 Concept, expected to make its WEC debut in 2026.
Jerome Policand's ASP squad, which has campaigned Mercedes GT3 machinery in the GT World Challenge Europe since 2016, had been widely tipped to be the organisation entrusted with this effort.
The team already has an existing relationship with Toyota as it runs the GR Supra GT4 in the French GT series.
As existing Hypercar class manufacturers are to be given priority for LMGT3 grid slots, it appears certain that Lexus will be among the marques represented in the first season for the class next year.
While ASP's announcement makes no mention of drivers, only stating that the line-ups "will be announced in a few weeks", existing Toyota WEC driver Jose Maria Lopez is believed to be on hand at Portimao to take part in the test.
It comes as Lopez is expected to lose his seat in Toyota's Hypercar squad for 2024 to ex-Formula 1 racer Nyck de Vries.
Jack Hawksworth and Ben Barnicoat, who like Lopez were present at Portimao anyway for last weekend's European Le Mans Series finale at the circuit, are also set for track time, already being familiar with the RC F from racing it to the IMSA SportsCar Championship's GTD Pro crown with Vasser Sullivan Racing.
Source: Autosport