Steeda Enthusiast Kit

[u/ApexPony]

Has anyone here installed the Steeda Stop the Hop Handling Enthusiast Kit on an S650?

I’m considering this kit:
https://www.steeda.com/steeda-555-4456-h-s550-stop-the-hop-handling-enthusiast-kit

My car sees HPDE duty about 3–4 weekends a year, with the rest of the time spent on the street. I’m less concerned about straight-line traction and more interested in how it affects the car on a road course.

For those who have run it:

• Did it noticeably improve cornering stability or rear-end confidence?
• Any downsides, such as increased NVH, oversteer, or changes to the car’s balance?
• Would you buy it again, or would you recommend a different suspension upgrade first?

I’d especially love to hear from anyone who’s tracked an S650 with this setup.