Quote:
Originally Posted by rasa bmw
your missing the point"filtering" foam are just not good at it,,i can put up a wrute up of what both filters can do and achieve,,if your car had black smoke then there was something wrong with it,,maybe a dodgy maf sensor or slight boost leak..
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I'm sure the paper is better at finer particles but is also more restrictive. Car was fine no leaks and new MAF. When we remapped it to the need for the less restrivitce filter was even more obvious even with what was a very consertive map