Good info. I need to get mine done soon, as my car has 35k on it and has had a Cobb tune for a couple of thousand miles now. Problem is, they'll need to be done next year by the dealer anyway to comply with the service schedule, so there's probably no point in me changing them - better off getting the dealer to change them now a year early than fitting a set for just one year/10,000 miles until the dealer does them next year.
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