An aftermarket panel filter will not bolt on 10's of BHP to any vehicle. What it will do however is clog up with air born dirt far slower than a standard paper or cotton filter. The multi-layered foam allows you to maintain your performance over time and reduces the potential loss of horse power when using a single layer filter material. Our unique method of production allows us to guarantee the surface area of every filter. The curved edges of our foam are rapidly becoming the trademark look of a high quality performance panel filter, only made by Ramair, here in the United Kingdom. We are proud to say that the exact same style of filters that we offer to the public are the same used by the tuning departments of no less than 4 car manufacturers, 3 of which are German.