Seems like there are so many choices of shocks (and struts) for your BMW?
Well, here is your cheat sheet!
1. Koni Special Active (1st shock on left above) is Koni's newest technology. It automatically adjusts to your driving style - comfortable when cruising and firm when cornering at high speed. It is best for those who like fun Sunday drives, but spend most of their time commuting on poor roads! It gives you the best of both worlds - firm control when you need it and comfort the rest of the time. Check out Koni's video:
2. Koni Sport (2nd shock) - otherwise known as the "Koni Yellow" - is the most popular and well-known performance shock for BMWs. It is manually adjustable, meaning you can set the firmness to what you want - with a dial on the front; and by compressing the shock in the rear (off the car). This is the best shock for enthusiasts who want to choose their firmness. Also great for those who track their car because they can firm up their suspension for ther track, and soften in for the ride home!
3. Koni STR.T (3rd shock) - also known as "Koni Orange". This is a great replacement shock for your BMW factory units. It is slightly firmer than a stock BMW shock, but otherwise keeps the same ride feel. It works great with stock springs and lowering springs. This is great option for owners who want to refresh their suspension without spending a lot of money.
4. Bilstein B4 (4th shock) - This is the most popular shock for those who want to simply replace their factory suspension with new. It is similar to the Koni STR.T, except comes in factory black color. It also comes in specific non-sport and sport versions to best match you exact vehicle. A great quality OEM shock. Great with lowering springs too!
5. Bilstein B8 (5th shock) - The B8 is a high-perofrmance shock upgrade. It transforms your car into a handling beast - like an M3! It is a lot firmer, so you will feel the bumps in the road more, but shines on the curves at high speeds. You can see that the shock is 3/4" shorter than the others, so it is perfect for lowering springs. If you do not plan to lower your car, then get the B6 model shock. It is the same as the B8, but slightly taller for factory springs. https://www.bilstein.com/us/en/product/bilstein-b8/
Final Question: Which one do you want?
"Find Your Favorite Road"
Chris, aka "Strutmonkey"
4. Bilstein B4 (4th shock) - This is the most popular shock for those who want to simply replace their factory suspension with new. It is similar to the Koni STR.T, except comes in factory black color. It also comes in specific non-sport and sport versions to best match you exact vehicle. A great quality OEM shock. Great with lowering springs too!
5. Bilstein B8 (5th shock) - The B8 is a high-perofrmance shock upgrade. It transforms your car into a handling beast - like an M3! It is a lot firmer, so you will feel the bumps in the road more, but shines on the curves at high speeds. You can see that the shock is 3/4" shorter than the others, so it is perfect for lowering springs. If you do not plan to lower your car, then get the B6 model shock. It is the same as the B8, but slightly taller for factory springs. https://www.bilstein.com/us/en/product/bilstein-b8/
Final Question: Which one do you want?
"Find Your Favorite Road"
Chris, aka "Strutmonkey"