It's one of those things most of us would never consider, but how is a performance air filter made? Shall we find out? Okay!
There's more to a performance air filter than just some plastic and a big piece of cotton wool. In fact, there's quite a process to make a quality filter.
Amazingly, the performance air filters in the video below are all hand-made, which Alex and Matt from Car Throttle soon find out as they're given a step-by-step guide of the process.
Hit play on that video below to find out more. Who knows, maybe you can learn a thing or two and make your own...
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