The p40S are lighter then the p40. they also have a slight design difference in the center hub. I am not sure what the S stands for but I'm sure it has to do with weight.
GLWS these are stunning. you should keep them they really set off your car well.
BEFORE YOU BUY YOUR NEXT BMW, PM ME FIRST WE CAN HOOK YOU UP!
David Aviles: firstname.lastname@example.org - Cell:202-262-2900
If you have any issues getting a hold of David PLEASE PM me, I'm available everyday till 645pm!