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I removed the Volvo air filter in my 2012 S60 and attached to it is a piece of grey foam. When I put the K&N filter in, do I need the grey foam? It appears to be glued to the Volvo filter but can easily be removed. The K&N filter in about half as thick as the Volvo filter.
Also, do the K&N filters void any warranties?
Thanks!
Also, do the K&N filters void any warranties?
Thanks!