The most recent addition to the NSX is a harness bar from Dali Racing. It is less expensive than competing systems, easy to install and comes highly recommended. In order to add the 5th point to the harness, I had two choices, 1) get new seats that already had a hole, or 2) to have a hole cut in the existing seats. It was not recommended to have the strap go all the way around the front of the seat. I took the seats to Town Auto Top in Fairfield, NJ (973-575-9333) and one day and about $180 later, here they are. I will soon take pictures with the belts sticking through the holes.