[usdm180sx]

What's up Steve, I used to have Flex on my s13. Spring rates on the flex are 7/7 for the s13. I have kei office xr now. Spring rates are 9/7. Even though kei office is no more, they have very very good dampening.

For example, there is a huge dip on the bellflower off ramp from the 405 north. The off ramp sweeps 90 degrees and the dip is where the bridge part of the ramp connects to the hill.

When I took this off ramp at 60mph on the flex, the car became really unsettled to the point where I almost lost control of the car. Scary as shit. When I took the same off ramp with the kei office the car wasn't even phased.

Spring rates don't matter, it's all about the dampening quality. Dampening quality gives the car composure over road uncertainties. Even though the spring rates are 9/7 on the kei office, the car rides like stock. What's even more amazing is high speed stability. When I punch it on the freeway the faster I go the car feels even more stable over road bumps.

If you plan to keep the car for awhile, go with some high end coilovers like zeal or dg-5. The enjoyment factor for your car will increase 10 fold exponentially.

Hope this helps.