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
The Pro-Kit is Eibach's best-selling lowering spring and the obvious first step for an F80 M3 or F82/F83 M4 that still needs to work as a daily driver. It drops the centre of gravity, tightens up body control under braking and through direction changes, and fills the arches properly — without the compromises that come with a full coilover kit.
Technical specification
Lowering: 20mm front / 5–10mm rear
Max axle load: 1050kg front / 1170kg rear
Spring design: Progressive-rate, cold-wound to Eibach's in-house spec
Damper compatibility: Tested on factory dampers — no need to change shocks
BMW M3 Saloon (F80), M3 Competition — 01.2014 to 10.2018
Pro-Kit or Sportline PLUS?
If this M3 is a road car first and a track car second, Pro-Kit is the right call — it keeps the factory ride quality largely intact while sharpening everything up. If you're chasing a more aggressive stance and firmer, track-biased handling and don't mind a stiffer ride on the road, look at our Sportline PLUS listing instead.
Fitted price available on request. We can supply and fit this kit in-house, including a full geometry check and corner-weight afterwards — important on any lowered M-car to keep tyre wear even and the diff happy.
