Next we added some prototype Mach V springs. They have slightly firmer rates than the stock springs, and lower the car down a bit. You can see the results here. The production springs will probably end up a tiny bit lower than what you see here. The springs are designed to be used with stock struts, or aftermarket upgrade struts in the future. We were expecting the ride to get harsher with the lowering springs, but it didn't really change very much. Body roll was reduced, but otherwise the car rides about the same as before. The stock shocks are quite stiff, so they don't seem to have an issue handling the upgraded springs.
Our 10th annual Mach V Track Day event was on November 8-9. We took the WRX out to the track with no specific prep work, to see how it would fare in near-stock form. The result was "Not bad!" Power felt great -- no complaints there.
Products mentioned in this post: Cobb AccessPort, HT Autos Bottom Line Kit