The ACO has confirmed the class structure and basic regulations for the Le Mans 24 Hours for the next two years.
As previously planned, the top LMP1 cars will be further slowed with reduced capacity engines. Normally-aspirated petrol engines will now be limited to 3.4-litres, down from 6-litres, diesel units to 3.4-litre (from 5.5-litres), and turbocharged petrol to 2-litres (from 4-litres). Downforce levels will also be reduced.
LMP2 cars will run using GT2 engines or more production-based units, while some common parts will be introduced to cut costs. Telemetry will also be banned.
The ACO confirmed that it is open to running the latest generation FIA GT1 regulations, meaning that this year's race will be the last for the likes of the Chevrolet Corvette C.6R and Aston Martin DBR9.
The GT2 regulations will also follow the FIA GT Championship and will introduce the new GT2 cars alongside the existing machines, such as the Ferrari 430 and Porsche 911 RSR. Measures will be taken to equalise the two types of car within GT2.