Thought this was interesting... Autotrader has an M5 for sale from Thomas Classics claiming to have a Switzer P700 package. False advertising??
Seller's Description and Comments
This 2013 BMW M5 had been fitted with Switzer's P700 package. The combination of hardware and software tweaks boosts the 2013 BMW M5s output from the factorys 560 claimed hp and 502 lb-ft of torque to nearly 700 hp and 640 lb-ft at the crank a huge improvement that can be felt in every gear.
http://www.autotrader.com/cars-for-s...44653280&Log=0