I thought ACR came with a 5 point harness that can be added on.The Viper never really had much in the way of options, so I'd be hesitant to think they would have offered different "regular" seatbelts. I thought they might have offered a full racing harness for stuff like the ACR, though I don't recall if they even went that far or just put the anchors in so people could pick their own. Then again, I'm always learning new things about these cars, so I suppose it's possible.