[Bulls23337]

what would be the advantage of the under chassis brace kit, just more stiffness?

yeppers! IMO, always remember that your chassis upgrades are as only as good as your tires. and the driver of course.

 

[Bulls23337]

the F has a rear brace already. see page 1: http://www.lexus.com/models/ISF/features/performance/Suspension_Story.pdf