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BMW gearset 3.73 ratio , type 188L, for rear differentials:
$200.00
Least expensive method to increase throttle response in type 188L model with numerically lower ratios, specifically:
E8X - all models ( not 135i or M)E9X - all models (not 335i or M)E6X - all medium size cases ( not large size cases or M )
Note: will fit earlier 188K models with some setup modifications, message for details
