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The maximum power of LMP1 hybrid systems has been capped for next year's Le Mans 24 Hours, clarifying an erroneous announcement made after this week's FIA World Motor Sport Council.



An upper limit of 300kW, equivalent to approximately 400bhp, has been introduced on safety grounds at Le Mans because it is an FIA grade 2 circuit.



Hybrid power will not be restricted at other rounds of the World Endurance Championship on Formula 1 tracks.



This is the rule that was initially announced after this week's WMSC as a restriction on the combined power of a P1 car's internal combustion engine and hybrid systems to 1000bhp.



The manufacturers were previously not restricted in terms of hybrid power at Le Mans, only in the amount of energy they could deploy over a lap.



They have not put figures on the maximum power of their hybrid systems this season, although last year Toyota announced a figure of 353kW or 473bhp.



Combined with 512bhp from its normally-aspirated V8 petrol engine that gave a theoretical maximum power of nearly 1000bhp.



The power of internal combustion engines is being reduced for next season: an across-the-board reduction in the energy allocation for petrol and diesel cars of 10 mejajoules per lap of Le Mans equates to a cut of just over seven percent.



Other rule tweaks for next season in LMP1 are focused on safety.



The size of the wheelarch vents, part of the strategy to prevent LMP cars from taking off, will be increased.



There are also new head restraint rules and changes to the way the field of vision from the rear-view mirrors is measured.