this one in picture definitely not cold air intake ,and no performance .its probably even worst as was oem air box ,as it will get only very hot air . im nearly sure u dont need anything more difficult - fancy stuff for more power . the good replacement K@N filter would be perfect ,the only performance in this style filter is - sound ,and it might be annoying u in near future . get de-cat if its not fitted yet ,and its very difficult to get nicer sound from diesel .i m really happy with Eisenmanns exhaust on my E39