Researching on installing for LI and found this:
DIY: Laser Interceptor/ Laser Jammer install - BMW 3-Series (E90 E92) Forum - E90Post.com
I feel so bad for the BMWs'. If you think the first page is great about installing the heads behind the grill, read the second page where a member explains why it doesn't affect the heads' performance. FOr any reason why they don't jam, i think they gonna call cliff and blame him for defective heads. I must say they did a great job installing through the fire wall, CPU box, and LI kill switch.