can anyone tell me if the sports package springs for all e60 are the same? anyone have part numbers? do the 525's and 530's have the same spring rate as the 545's and 550's? basically what i am asking is will i get the same drop using sports spring from a 2007 550 or 2006 525 on my 2005 non-sports 530?

 

I think they are different. V8 and I6 engines weigh different....

 

thats what i was thinking too.....