High performance tires are usually 44-50psi max cold.
I set mine in the 38-40 range front and 36-38 range rear. It keeps the sidewalls nice and stiff for cornering and is well within the tires range.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black