Some more information from the product engineer on this bolt in bar
"So glad to see this product finally coming to market!! As the guy who spent many (many!) hours with REM designing this at the request of MOPAR, I thought I'd chime in to answer some of the questions being asked.
What's the Point? If you have never driven your car on a road course or autocross, you may not have experienced just how inadequate the OEM (or really any 3-point system) is at keeping you in your seat. *As the lateral G's climb, you start sliding all over the place and end up using your arms, feet, knees, and anything else you can to try to keep yourself in the seat. *By comparison, when you strap in with a real harness, you can crank it down tight and focus on driving the car, not keeping yourself from being flung out of it! *If you haven't driven a car on track or autocross with a harness before, ask a buddy to try it out and then you will definitely get it.
Why do You Think We've Been Asking For This? That came directly from the folks at MOPAR. They said that a bolt-in harness bar is one of the most-requested accessories for these cars they get asked for but don't have. I did not see their "data," but based on their commitment to the project, I believe them 100%.
Okay, so if MOPAR Wanted it So Bad, Why Aren't They Selling it? You would have to ask the legal group there for the specifics, but it came down to liability (after 12 months of review). Now, before you go all wacky on them thinking it was too unsafe, it had nothing to do with that - it was more a question of altering - in any way - the NHTSA-approved OEM safety equipment. *The MOPAR engineering group reviewed and supported the product 100%.
Surely Using a Racing-Type Harness on the Street Will Cause Certain Death, no? Nope. This is one of those time-honored Internet arguments that I'm not going to get too tied up in, but here is the jist... Very few injuries incurred during rollover accidents have anything to do with "spinal" damage or compression injuries, they have a LOT more to do with the occupant moving around inside (and, sadly, often outside) the car. A good-quality 5+ point harness will do a lot better job of keeping you in the right position (middle of your seat!) so the other safety systems in the car can protect you. All the LX/LC (and, in fact every modern car) vehicles have built-in rollover protection - in fact the Challenger gets a 4-star rollover safety rating from NHTSA. If you want to read more about this issue, there is a good article
here. My opinion here is not based on internet searches, but on my own conversations with OEM engineers, race engineers, safety engineers, and my experiences in designing safety systems.
But This Harness Bar Can't be as Safe as the OEM Belts, Right? Well, that was the whole design challenge MOPAR presented, and that was the reason I developed the center bracing for this bar which does not exist on any other harness bar (at least that I'm aware of). This bar will keep a 200-pound driver AND passenger safely restrained in a 20G frontal impact (that's a pretty solid hit). It will deform with those loads, but will not fail. We use two of the 3 OEM mounting hardpoints on each side, and add 4 more hard points that this mounts to. So, we've done our homework, and though I have no data other than FEA to "prove" how safe this is, I will say that I take my personal safety very seriously - to the point that I stopped doing racing instruction because I was so often in the right-seat of under-prepped cars. With this harness system in place (and my HANS device and helmet on!) I would feel much safer finding the limits of these cars than I would in a factory 3-point harness (which does not allow use of a HANS, btw).
So, like every product this one isn't for everybody. I would say anyone who regularly autocrosses or runs track days would definitely benefit, and that's who we designed it for. *You can install it when you need it, remove it without any signs it was ever there when you don't want it, and be safer and more in control while using it. Whether or not that's worth the money to you is up to you, but the product is sound.
If I missed any other questions, just ask.
Finally, here are a couple images of some of the FEA work we did early on to validate the bracing mechanism design. Both represent the 20G impact mentioned above, first picture is driver only, second picture is driver and passenger.
