Ok do a few 0-60 runs with a stock dirty filter and a new stock filter. Then slap on the K&N I bet the times will not change a bit. The turbo will be louder though. Also to flow more air the also let in more dirt, so you will be sucking more dirt into your engine. So will gain nothing and get a little more dirt sucked in with a little more noise. Don't waste your money.

__________________
2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200