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I'm using the 1WNR, which is the 1-way rebound adjustable damper with no external reservoir. It's fully capable of anything I throw at it. Not cheap though. it was about $4,000 for my setup with Swift Racing springs. The Tein RA is in the same class- it's a bespoke motorsports quality damper that was tuned for the NSX by a major manufacturer on tracks like Tsukuba and Motegi. It has shock bodies and rods cut specifically for the NSX and like all such systems, it has plenty of droop travel. I never liked the rear-biased spring rates though (10F/12R). Many of the Japanese test drivers preferred this bias in the 90's when these systems were being developed. However, I find it too "oversteery." If you're not tracking Charlotte anymore, you might want to see if Tein can re-valve to something like the S-Zero spec (8F/6R). It's a lot more friendly on the street but can still be tracked.