IMHO, the center bars will be too close to your head, as well as the passenger's head. Without a helmet, that is a head injury or death just waiting for the right circumstances to occur.
If, you & your passenger always wear full 5/6 point harnesses ... tight ... you need any roll bar tubes to be a minimum of 6" away without a helmet. The exceptions to this would be:
* Where the headrest prevents your head from going back towards the main hoop
* If the seat was a full containment race seat, designed to limit side to side head movement.
Best wishes, Ron
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Ron Sutton Race Technology
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