Very excited about my next mod. My Copen rolled off the assembly line in April 2004 - but was marketed as a 2005 Copen. Anyway, like all of the early first generation Copens, it came with a standard differential. I was aware of after market LSDs for L880K, but they were not cheap and perhaps not suitable for street driving. Then I discovered that the later years of first generation JDM Copen production had an optional 1.5 way LSD. Daihatsu part number: 41100-97220. Below is a new one, I just bought a 40,000 km used one on Yahoo for ¥ 35,000. Will report back when I get it and have it installed.