Hello. Bought the ST on April 28th. I actually traded a 2011 ford Fiesta se sedan, red with about 82,000 miles on it. Before the 2011 Fiesta I had a 2000 Mazda protégé sedan. I would like to eventually do a few modifications. I only have 175 miles on the odometer so far. I'm thinking about letting ford do the upgrades. ( Ford Racing ). I guess if they do the upgrades my warranty remains ok? Nothing major. Upgraded exhaust, for a deeper sound. And I think maybe an aftermarket BOV. I do like the sound it makes on the modified cars. Everyone take care.