Blackline BMW 1 3 SERIES E81 E82 E87 E46 E90 E92 188L LSD Limited Slip Diff. For vehicles fitted with 188L differential. Blackline BMW E39,E46,E53,E60,E81,E82,E83,E85,E87,E90,E92,F25 Helical LSD. The helical gearing manages the distribution of friction within the LSD.
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