Hello All,
Anyone come across this CSL replica airbox for the Z4M? Apparently it comes in three different forms and the CSL/Street looks like it doesn't need software as it retains the MAF hole. $3K is a little pricey, but I wonder what kind of gains you can get.
http://www.bimmerworld.com/html/e46-...csl-airbox.htm
Cheers,
Zoomby_U