Fast Specialties Diesel Dyno Day 2 (Video) 1 discussions This is one of our Diesel Dyno Days in October 1st of last year. Another one is coming up this April 15th. Check out our site for more information. www.fastspecialties.com Tags: diesel dyno cummins duramax powerstroke chevy chevrolet gmc dodge ford smoke oilburner biodiesel truck performance