Air intakes are such a personal thing. People who spend 5k on a CSL airbox imo are mad, but my old CSL sounded amamzing, and put a smile on my face every time i drove it. So ultimately, do what makes you happy
They are.... I got a K&N replacement filter and the induction noise is awesome. Engine does seem to breath a little better also, but it's probably a negligible 'placebo'... but for £29.99 MEH! :wink: