well I have owned my 08 IS F for about 2 weeks.. absolutley love the car. Was a faithful BMW guy for 15 years but decided i was tired of dumping money into them. I figured out why the BMW forums are so active,,everyone needs help fixing problems with their Bimmers..lol.. well heres my problem everytime I get on the F it smells like rotten eggs really bad. it only has 25k miles on it, so i really dont think the catyltic converters are fouled up, or could they be? anyone ever experience this. also if i decide to take it to lexus and have them look at it, will they give me problem because it has a K&N intake on it. not sure how lexus looks at this? any help would be greatly appreciated, thanks