I'm selling my Basslink that I had installed originally in my Z3, but I sold the car and dont really want to add more sound to the 135i. The sub is in excellent condition and works great. The sub was on the car for only 8 months.
For more info on the sub:
http://www.crutchfield.com/S-3FMKkK8...-BassLink.html
For some reason I cant add anymore pics, if you want anymore ill email them to you