TGJ said:
SCT and DiabloSport products DO NOT Void your warranty. The only way they can is IF the SCT tune or Diablosport tune is PROVEN to cause the damage.
That is what SCT and DiabloSport hopes you believe, but unfortunately, it isn't true.
All Ford needs to do, it so prove the parts are performance oriented, and that is pretty easy for these types of items.
The Magnuson-Moss Warranty Act has multiple sections, and it is one of the other sections which aftermarket companies like to pretend doesn't exist. That section allows manufacturers to fully void a warranty if there is any evidence of abuse. Unfortunately, performance parts are considered such evidence; if you have them you must be making use of them.
Now, if you have a good relationship with a particular dealership, they might just look the other way. However, if they don't, you can't force them to.
As to parts Ford itself sells, well, they are a special case. Ford does allow those to be installed, and not affect Ford's warranty. Yea, they can be the exact same part you can buy elsewhere, but Ford adds to the price when they sell it, the cost of the extra risk.