[DL335D]

Originally Posted by FaRKle!

Go with the E10-20-031-18-22 kit. The front spring from there is F11-20-030-03-VA, same as in the E10-20-031-05-22 kit. It's 15mm shorter than the front spring in the E10-20-031-06-22 kit.

Helpful info. Does this E10-20-031-18-22 kit also work for 2016 435 xDrive Gran Coupe?

The euro part # guide doesn't list out any compatible Eibach springs for my car.

[Torquey]

I am putting together my own "B12 kit" by getting a set of Bilstein B8s shocks and Eibach 05-22 springs. Ordered the gently used B8s from the classifieds and the springs from Amazon UK (cheapest I found). This will go on my 2016 335i GT (F34).

Should I get some E60 or F8x rear bump stops for good measure, as suggested by FaRKle? Also are the stock strut mounts still good to reuse at 50k? This thread along with a few others have really helped me make the choice. TIA!

[UGA99]

Originally Posted by Evo400

Eibach and Bilstein both have their own B12 kit. Which is exactly what you're asking for. Its a combo of B8's and Eibach Springs.

I have actually just ordered the B12 set from a supplier in Germany.

Altough the kit supplies 06-22 springs, the seller insisted that I should go with 05-22 which is some 15mm lower and it will make the car look level as both spring kits have the same size rear springs.

I will report when I get them fitted in a few days..

1 year later whats your experience with this setup. looking to do the same thing on my 335xi

[Evo400]

Originally Posted by UGA99

1 year later whats your experience with this setup. looking to do the same thing on my 335xi

Sorry for late reply.

The B12 is a good set up if you're just looking to lower the horrible X-drive ride and stiffen up the suspension.

It transforms the car in that aspect, and brings it inline with standard Msport suspension, although a tiny bit stiffer.

Driving is a lot better, but far from perfect. Its a great set up for daily drives, fast highway speeds and light cornering.

The B8 struts are awesome in that aspect, they dampen the road pretty well at high speeds, but for me the springs are the let down. They are little bit too soft for me. Still lot better then OE but still soft. I wish they were more progressive. But hey, that all you get with B12.. Next step is B14 if you want what b12 lacks of.

At this stage, a year later, I'm looking to upgrade again. I want B16 really so I can play with adjustments,drive faster around the corners, have even more stability but they come at the price. I might just go with B14..

So in summary:

B12 if you want upgrade from stock, lower and stiffer the ride, but with some sort of comfort in mind. Great for dailys and fast highway driving

B14 less comfort, stiffer ride,can lower the car even more, progressive springs more suited for fast roads, corners and even trackdays..

[STDK]

I have been looking to upgrade for a while and I am considering the B12. As I see it there are two B12 options: Pro or Sportline. Same shocks but different height of the springs/lowering. Either 30-25/25 or 40-35/35 (sometimes it says (30/30 and 40/40). All threads and pictures online only even shows and talks about the pro kit and am REALLY curious about the Sportline because in theory at least it should be firmer than the pro kit.
I am looking to upgrade my daily ride. No track days but I drive it like it was meant to
I am unsure that the pro kit is too soft but also if the Sportline kit is too low.
I have 37,5cm from hub to fender in the front and 35 cm in the back. That translates into about 5,5cm from top tire to fender in the front and about 4 cm in the back.

Does anyone have expirience with the Sportline B12?

I have lowered two previous cars with Eibach pro springs but never got the mm lower that was listed.