SE-R here but I've got 51 PSI max Y-rated tires and when I got them from a major Michelin dealer they were balanced and filled to 41. The answer I got when I asked if this was a good number (as the inside door label specified 33 front and 30 rear) was "well, I wouldn't go past 46." ummmm....okay....
Nice superlight glide but we're talking spine-shaking ride here.
So for the last several days I've been assuming I had to get a gel-seat until I spoke to the tire dealer I should have bought from who said, no, just because it's a 51 tire is absolutely no reason to go past 40 and in fact his BMW's on 51 PSI Pilot Sport summers and not even considering comfort etc, he found he got the best handling and stability between 33 and 36. Meaning, though you definitely get gains in some areas by increasing PSI, you could be losing in others and that when it comes to a sporty car there's more to the manufacturer's recommendations than they get credit for. Sure you need to ignore door labels to get better handling on a hyandai, but we've got more, overall, going for us in the SE-R/Spec-V.
03 Blue 5-spd SE-R
205/55ZR16 Pilot Sport A/S