| 31. | Front seats have active head restraints and their seat belts are equipped with pre-tensioners and force-limiters.
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| 32. | On the minus side, there are head restraints and shoulder belts for only two back-seat passengers.
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| 33. | Formula 1 and CART both require head restraints.
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| 34. | The head restraints don't look very strong either.
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| 35. | Among motorists with fixed head restraints, nearly half were out of position for the best protection.
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| 36. | He also felt NASCAR treated him unfairly last weekend by forcing him into a head restraint.
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| 37. | Called ROPS, or roll-over protection system, the hoops are folded down behind the standard head restraints.
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| 38. | In a rollover, a roll bar deploys and head restraints extend in less than a second.
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| 39. | New safety requirements included front seat head restraints.
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| 40. | He said it will cause drivers in all forms of motorsports to begin using head restraints.
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