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There isn't much NASCAR can do about it. They tried to limit it at the 500 in Feb. with limiting the time that one car can spend pushing another by reducing the airflow to the radiator, so the car that is tucked up behind the leader would overhea, and the cars would be forced to switch places.

But, these new Chevy RO7 and Ford F9 engines cool better by dispating the heat more efficently, and with better water circulation through the block and head. These new engines seperate the 2 center exhaust valves in each head, which was always a cause of tremendous heat in a small block engine.

The heads on these new engines have the valves "Canted" like a Big Block Chevey was. That greatly reduces the heat generated by the engine.

It is some much more visible at Daytona now because they re-paved the track and took away the roughness that Daytona was famous for. That means the car in back can stay behind the car he is pushing without upseting it due to bouncing over the old rough Daytona speedway surface.

The only way that I can see them stopping it is by vastly weakening the front bumper and valance area, and by weakening the rear bumper area.

But that brings up another potential problem of teammated deliberately knocking off their teammate's rear bumper cover so their is much less drag on that car.

I watched many teams putting a layer of GREASE on their rear bumper cover / valance right on Pit Road before they started to roll off. They usem grease to make that area slippery so their car doesn;t get spun by the car pushing them.

But that is NOT the craziest thing I've ever seen done to a car before the race.

I've watched Harry Hyde put Talcum Powder on his cars before qualifying.