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smooth off the tb

  1. 1993 e36 318IS - Smooth off the TB" how is this done ??

    BMW Tuning Forum
    ok could i upgrade the Throtte Body for a 318is E36 to a 320i E36??also what do you mean "Smooth off the TB" , ive heard this a few times ,how is this done and why do people say do it??
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