Long long ago (think "1970") are used to buy rear sway bars from third parties install them on my sleeper/performance ICE cars.
personally, as far as Iām concerned, the handling of my 2021 Bolt in factory form is **** good, good enough that I wouldnāt bother. Iām of the āif it aināt broken, donāt fix itā school.š
also, note that there is at least one vendor already supplying rear sway bar for the Bolt:
BHR93 Whiteline Rear Swaybar 22mm For Chevy Bolt, Chevy Cruze, Chevy Volt
I suppose if I was doing autocross I might be more interested.
Before I hack sway bar in, Iād go for different tires.
Note that the bolts OEM rear suspension is described as "Compound crank (torsion beam)ā¦"
and if I remember right, there is a downside to having a stiff anti-sway bar:
Itās making the independence of the independence suspension less independent. Not so good when one rear wheel hits a pothole.