You can absolutely put some 9k springs on the rear of SS2s or T2s, it can work really well.
Indeed! And you see a lot of very different and strong preferences from various suspension tuners. Even rates from 949 racing and I think Strano and sometimes CSG, stiffer fronts from MCA in Australia, stiffer rears from a lot of the newer more focused tuners, and so on. And for track cars big rear wings are a lot more common these days which certainly makes stiffer rear rates a good idea. You can make arguments about flat ride vs sucky front mcpherson struts, and both are important with plenty of nuance and details to sort.
We are actually flexible...but primarily spec even rates on our kits as standard. One reason for that is because out of the box with minimal supporting mods, it just works really well for people with a wider range of goals. And it's easy to drive and set up for most people. It's harder to screw up the driving and the overall set up.
And so we also do custom kits,
almost all of which use stiffer rear rates because the type of driver that wants a more custom set up is the type that will benefit from stiffer rears.
Our new 3 ways do come with slightly stiffer rears as standard, but of course we can customize them.
For my car (street only at the moment) I'm on 5k/6k right now with 3 ways and stock bars and it's mega fun and comfortable. It would easily be
faster with just adding a bigger front bar, or just switching to 6k front rates, or just switching to stiffer rear rates...whatever..as long as the rest of the car was set up well but I'm just having a good time and this works really well for my uses.
- Andrew