First set of parts presented to me: air filter was incorrect part (completely wrong shape air filter). Salesman exchanged air filter, the second one he brought out seemed okay. Took them home, changed oil and filter, went to change air, wrong shape, wouldn't fit air box. Nevermind, I'll change the rear wiper blade. Oh that doesn't fit either. On top of that, I couldn't have exchanges only refunds because I'd bought all the original kit on a special offer. So I then had to pay extra for the air filter to actually fit my car, even though I'd bought the one suggested to me by GSF!