If you question them they do say the pressures on their Web site are maximum pressures. Most people run lower pressures. I would say try running BMW pressures and see how they feel. I run mine slightly higher than BMW.
07 Sport, Sapphire Black, matching 108s, carbon badges, ZHP, stubby and NO RUNFLATS!
IIRC stock pressures with run flats is 2.3bar on the front and 2.6bar on the back (I'd go check, but it's raining quite hard out ). I think that equates to 33 / 38 PSI.
3.0 Si Sport Roadster, Black Sapphire, Dream Red leather, 108s ; sound gen, stubby, de-badged, c/f roundels, black grilles, clear brake light, Gaptech, Intravee, cup holders, ///M dash needles, non-RFTs, spaced, Eibachs ...just drive it