This weekend I installed some 20mm shims on my front shocks (https://www.ecstuning.com/BMW-E46-33...Front/ES49751/) which made an absolutely amazing difference. With the Koni/H&R cup kit I've got and the +41 offset of my wheels, my car was almost un-drivable as the front end would heavily rub over every single bump. So once they were installed and I took a few laps around the hood, I measured the ride height side to side to make sure it was even. When doing so, I decided to check the rear height as well and as it turns out, the passenger side rear of my car sags slightly, maybe 3/8" lower than the driver side. I thought it was just on uneven ground, but it wasn't. 3/8" may not seem like much, but to me it's super noticeable with the ride height I have. Couple questions A) what would cause this? And B) any ideas of what I can do to raise it up to match the driver side? Are there shims for the rear springs? Maybe add another upper/lower spring pad?