BMS JB+ (N18) Cooper S For Sale: Hi all! I recently sold my 2011 Cooper S, but I kept the JB+ that was on it. The JB+ transforms the already fun Cooper S into a monster. It's the safe, quick and easy way to add a huge amount of power and torque to your ride. It installs in 30 seconds and does not require you to remove your ECU (voiding your warranty). If you want to transform your ride into a totally new experience, this is the way to go. I have only had the JB+ for around 6 months so this device is in like-new condition. I'm only asking $225 (including shipping) for this device. Please send me a PM for contact info if you have any questions. I'm flexible with payment options, so we can discuss what works best for you!