Definitely not. The Spec Miata Bilsteins were designed for smoother circuits than actually exist in the real world. Our SM customers strongly indicate YES, Elite tuning makes you faster! If you watch our 'How Shocks Work' series for Spec Miata, you'll see where improvements can be made. Even brand-new shocks have large variation in rebound force, something only a shock dynamometer will reveal.
Expect lower lap times by 'a second plus'. You'll bottom out less, handle rougher tracks much better, keep the car on the racing line more easily, and have more grip (especially in wet or dirty conditions). Imagine that - a faster AND more comfortable race car - win-win! Run your setup the same way as before. You can have us change the shock oil every couple years of racing.
Rules may change, but as of 2016, our work meets the stated SCCA and NASA shock test specs. We've even created multiple videos showing how the out-of-box valving compares to the FCM-SM-MAX revalve. The rules may change for 2017 (and if they do, you can blame or thank us), but data always trumps assumptions and we will come up with a revised recipe so watch this space!
FCM-SM-MAX valving is $200 per corner. Our Ripple Reducer feature ($100 per corner) is automatically included to optimize the setup. Yes, you need it. We're usually able to complete a build in 3-4 weeks non-expedited, or 1 week expedited (30% extra). Send us an Elite inquiry with your lead-time requirements, whether you have dampers or need us to supply them, etc.