I just installed the Forge Adjustable Rear Tie Bars and I am still in shock at the flimsiness of the stock setup. These bars are a huge advantage over stock. Added bonus, they come with race (black) PowerFlex bushings installed:

https://myredmini.com/forge-adjustable-rear-tie-bars/

 

The boots are a great idea, at least for snow states!!

But the price, ouch!!

 

Stupid snow

Yeah, they are a touch pricey but Im going to track my mini a few times this year so Im excited about the adjustability.