I had already bought and installed Whiteline rear subframe bolts today in my FXT until i saw this just now. It does make a difference on top of the sti rear swaybar and Subtle front fender braces i already have. Keeps the rear planted like having a more effective rear swaybar. I noticed less lean or tipping side to side on a 15 minute test drive.

Not a bad way to spend $10 according to the OP, compared to the $40 For the whiteline bolts i bought,.,

DIY Rear subframe lockdown bolts. - NASIOC

 

tried this out today... ended up breaking the weld on the catch bolt guess i should have knowing better seeing how my subframe is pretty beat up. Did you bolts and brass bearing sit straight or did you have to grind out the inner lip?