EFI Classes FAST Man EFI is hosting seminars in June 2017 in Sonora California. Learn EFI near beautiful Yosemite California. See the Motherlode, Old town Columbia, Yosemite Valley, Jamestown Steam Train #3 (from Back to the Future), and oh yeah … learn something about EFI too! We are doing two tunes at this class: a 1000 HP race car on methanol, and a 600 HP street car. The first seminar is a half day overview of everything that's out there (vendor non-specific). The XFI training class starts on the next day and is hands-on tuning of the FAST XFI system. Looking for a reason to come to the Mother Lode? Why not? Get details from my web site fastmanefi.com.