I too started out with a 4 point ASM and a harness bar for about a year. But it still made me super nervous so I started running JUST the lap portion which was brilliant, way better then CG-Lock's. Eventually doing the full monty. It's already bad enough that the 8/9's have like a 2 star crash rating, then you put them at super high speeds with questionable driver experience and conditions surrounding them. I will have to...regrettably...admit though....that a harness bar is one of the best chassis stiffening mods out there for a full-time daily driver.

 

i would think twice about a harness for anything other than autocross.