BMW 188K 188LW Diff Shim Set by Diff Lab

This is a 6 piece diff shim kit to suit the above vehicles with the mid-sized 188K, 188L and 188L/W diff. This is most BMWs after ~1998. It contains all of the shims needed for a new blueprinted assembly. The kit contains 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm and 0.5mm. This is the largest shim kit available in the world. These shims are used in-house at Diff Lab to achieve factory specifications to within +/-0.02mm backlash on the pinion and to within +/-2 in/lbs carrier pre-load. These are the only shims available for these diffs which are slotted, and feature circlip style holes for much easier installation and removal. Choose the best shim kit available in the world when installing an LSD or rebuilding your BMW differential.

Diff Lab provides no support to DIY'ers. These parts can be purchased by anyone, but are considered "trade products" for automotive specialists who already know how to use them. A surface grinder is needed to produce smaller circlips from your existing items. As a last resort, a standard 90mm circlip can be used to obtain a 3mm starting point.

Installation is not a DIY job for beginners.  You need a 0.01mm dial gauge, a 10+ tonne press and an in/lb gauge to setup a new LSD. With the right tools it is a 15-30 min job. I assemble fully blueprinted differentials on exchange with all new components. Diffs for most vehicles are in stock. Contact me for a quote on a complete diff upgrade solution.