SHELBY GT 350 Member
Joined: Jan 2011
Location: Central Massachusetts
There are lots of threads about this; it really comes down to: is your dealer "mod friendly" and will they work with you; or are they looking for excuses to get out of any warranty service. It sounds like your dealer is the latter, so probably best to avoid any tunes if you are going to work with them.
| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day