Realistically..........IMO
Full cages = helmet, shoulder harnesses, and padded bars so the helmet isn't compromised. Practical, no, logical, yes.
150 mph in a timed competitive event = full approved cage, seat, 5 point harness, helmet, fire suit, etc. Especially on a public road event.
You can yard-sale a high hp car in a matter of milli-seconds.
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