Hi Everyone. 1st Post. Taking delivery of a blue Tbss today. Looking eventually to do a full exhaust including headers and high flow cats, ecm tune, and CAI. A lot of recent posts have brought up the issue of K&N filters and MAF oiling. Has anybody looked into AFE filters. I have an'04 GMC Duramax with an AFE Stage 2 intake. A lot of diesel tuners seem to be using these filters because they apparently don't have oiling problems, and filtration tests showed them to filter to the same extent as the OEM Delco whereas the K&N filtered significantly less. Eurotuners seem to be adopting them as well. Afe was apparently formed by a group of former K&N employees that started their own company. I have 30k on my system with no problems. Just a thought.