String Theory Garage will be closed to the public from Wednesday, 29th July to Thursday, 6th August for our annual shutdown.
If you need to get in touch, please leave us a voicemail or send an email. Our team will happily get back to you when we return on Friday, 7th August.
Shopping online? Don't worry! Our online store will remain active! We hope to ship orders placed for in-stock items as normal during the shutdown. Anything else will be dealt with upon our return.
Thank you for your understanding, String Theory Garage Team
Eibach Pro-Kit Lowering Springs — BMW X5 M (F85) / X6 M (F86)
The F85/F86 M cars carry a lot of weight high up, so even a modest, sensible drop makes a real difference to how planted they feel through faster corners. Eibach's Pro-Kit is tuned specifically around the M-spec axle loads of the X5 M and X6 M, lowering the centre of gravity while staying compatible with the factory dampers.
Technical specification
Lowering: 10mm front / 10mm rear
Max axle load: 1420kg front / 1755kg rear
Spring design: Progressive-rate, tested on factory dampers
Part numbers: E10-20-032-02-22 / E10-20-032-04-20 (revised spec, same fitment)
Fitment
BMW X5 M (F85) and X6 M (F86) — 05.2013 to 07.2018
Excludes vehicles with self-levelling rear suspension
Why such a modest drop on an M-SUV?
10mm sounds conservative next to a saloon Pro-Kit, but on a two-and-a-half tonne X5 M/X6 M it's a deliberate figure — enough to visibly reduce arch gap and lower the centre of gravity, without eating into the suspension travel these cars rely on for ride comfort and load carrying. If you want a more dramatic stance, talk to us about coilover options instead.
Please double-check whether your car has self-levelling rear suspension before ordering — we're happy to confirm this from your registration.