Porsche is building a one-off custom version of its 963 race car. Read all about it, here.Porsche highlighted a bespoke 917 that was converted for road-going duties earlier this year and snuck in a teaser for the now-named 963 RSP.The Porsche teaser video suggests that this 963 RSP will make its debut at Le Mans, which kicks off on June 14. Porsche has confirmed that the 963 RSP will be a lone example.You can’t say Porsche was exactly subtle in its previous teaser. That said, the assumed road-going, confirmed one-off hypercar is actually happening. Porsche confirmed that this machine exists and gave it a name in a second teaser. The second teaser, which you can watch below, shows the team at Porsche working on what now know is the 963 RSP. This one-off creation is going to sport a hand-stitched interior, proper finish, and a serious attention to detail. While we still don’t exactly know what the 963 RSP is going to be underneath the skin, we can make some assumptions. It will probably sport a derivative of the 963 race car’s twin-turbocharged 4.6-liter V8 for motivation. It is also a safe assumption that Porsche will keep the 963’s hybrid system intact. However, this bespoke 963 RSP won’t be subject to any of the balance-of-performance rules that tamp down the race car’s output. That means this 963 RSP could have a huge output figure.Porsche has also basically confirmed that we’re all going to see this one-off car show its face at this year’s 24 Hours of Le Mans. Of course, the price, and would-be customer haven’t been disclosed, but it’s safe to assume that if this leaves Porsche’s stewardship, it will cost a small fortune. Do you think Porsche is building this for a customer? Tell us your thoughts below.