I have two very reputable Mustang performance shops near me and I'd like to develop a good relationship with them. I got a quote for a JLT cai for my 2014 GT. It's upwards of around $1200. Looking at ittemzed, it make sense, but its still kinds steep for what it is. The service I'm questioning is the DYNO tune @ $400. I'm a class B mechanic so I can easily do the install and figure out the tuner(I'll ask that in another thread), but do I really need to get it on a DYNO?