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K&N Air Filters Part #33-2372 Customer Reviews
6 Customer Reviews
Reviewed by TED F (FLAGSTAFF, AZ) Reviewed for a 2010 BMW Z4 — May 03, 2011 11:00 AM
I have used K&N on all my cars both drivers and performance cars such as 911 Turbo, MB AMG, Vette Z06, Viper,Hot Rods, as well as all my Harleys. I"ve never ever had any issues with their products. Per the Dyno K&N HP/TORQ are right on or over the published numbers.I never even look at other filters K&N has never let me down. Ted
Reviewed by William L (Burlington, VT) Reviewed for a 2007 BMW X3 — Nov 23, 2009 8:15 PM
Definite, noticible increase in output from '07 BMW X3 w. 6spd manual. Installation a bit frustrating because depth of K&N sealing surface seemed greater (or firmer) than stock filter making refitting cover a challenge. It certainly won't leak around edges now, however. Obviously a very simple and cheap way to gain some extra HP.