I don’t know, but back in my S2K days, I did a Hondata flash, then returned to a stock flash for smog, and the ecu didn’t know it was reflashed. I’m thinking it may be the same but I can’t tell you for sure. ECU security is insane now.
Don't know the sound levels but the HKS and Remark are pretty quiet, and in my opinion, the best sounding with everything else stock. Not a fan of the crackle pitch of the Remark compared to others though, but that's all personal preference. Sucks in CA we are stuck with the crackles cause we...
Just lift up the dust cover of the shock and you will either see the white spacer or the silver part of the shock. If you see white, it is probably the spacer. Turning your wheels will give you more room slightly. Not much space for a video, but look at the thread zrk linked to for more...