A Mazda MX-5 / Miata modification to allow the standard horn clock spring to be used with a Momo Boss and after market steering wheel.
BMW E60 5 Series Stereo Tweeter Install
This is DIY install of generic non-BMW tweeters on a 2006 BMW E60/E61 5 Series. It shows the parts that you need to buy, how to prepare the car and install the tweeters.