E30 Zone

Hi, just wondering if all H&R springs are the same, or do you need to find ones that are specific to your car (can only find ones that say 6 cylinder only)? I'm looking to get my 318is to a respectable height, it's on originals at the moment, so a bit boat like! But on the other hand don't want to go mega low, just a good height to narrow that fender gap!

Any suggestions at all would be great