[boydcoddington]

I can tell you unequivocally that the bolt pattern for both the 300C and the Magnum is 5x115. Keep in mind that with the extraordinary quality that Chrysler is putting into the suspensions of these vehicles, any aftermarket wheels that you purchase should be hub centric to the vehicle or it will translate directly to the steering wheel in the form of a vibration. A huge problem with a lot of cast or other than Forged wheel companies today is, the fact that they build one wheel to accommodate several vehicles so what they do is, drill the center bore of the wheel to the largest diameter they can to fit as many vehicles as they can.

The offset of the wheel can always vary a couple of millimeters and is in most cases, a matter of opinion if you want the wheels more towards the fender or more to the inside of the vehicle.