There is a huge debate over air filter choices. In order to avoid another useless air filter debate thread, Simply make a decision on your own. It is strictly a personal decision. Enough said. Done.
Look up Jibbby, He is one of our highly esteemed SC gearheads (especially sc400's) I am sure he would help out a fellow member.
http://us.lexusownersclub.com/forums/index...?showuser=13978
I agree with having the spoiler installed as an option, It certainly(IMHO) add a nice look to the es and there is a certain amount of function that is added.