M3_Power 636 Report post Posted October 17, 2017 (edited) Used Genuine K&N RF-3301A filter cleaned and re-oiled with K&N recharge kit Plenty of life left in it. Used in a couple of GruppeM intake systems I believe. This one came off an E46 M3 GruppeM intake I own. these I believe are close to $300 new and only available via GruppeM not K&N directly. $120 Edited October 17, 2017 by M3_Power Quote Share this post Link to post Share on other sites
