Im just wondering how it will perform w/o a tune right away because im looking to doing more mods before i actually tune it so im going to put the filter in with the MAF adapter and wait till i get some more money for other mods and a tune...I would just like to know if theres any idling problems and if there is any performance diffenrence id like to know. (BTW its the $80 one on the buschur site). Thanks.