Don't modify your new Mustang - Ford said so

[67XR7]

Originally Posted by JMitch19

Buy a "spare" pcm and flash away. Put the untouched stock pcm on the shelf in case it needs to be reinstalled at a later date. .

[camcojb]

Originally Posted by JMitch19

Buy a "spare" pcm and flash away. Put the untouched stock pcm on the shelf in case it needs to be reinstalled at a later date. .

Originally Posted by 67XR7

won't work with late model stuff like the diesels. The new ecm's track a lot of stuff and when you swap it and then put the original back in it'll show a large area of no info recorded. In the case of diesels, there would be no regens showed but a bunch of miles driven. Not sure if the gas has similar things it tracks.

[BBC69Camaro]

Looks like there is some very limited warranty coverage under certain conditions through FRPP:
http://fordracingparts.com/announcements/news47.asp

[DBL NKL]

It's tough trying to get away with any mods these days, and rightfully so I would think. I have an 09 Duramax with aftermarket exhaust, air filter and a tuner onboard. Both of the major truck dealerships here have seen the truck since and both were clear right up front that any power train warranty is dead in the water.

Been the that way with Harley's for a long time and I basically take a new Harley, change out the motor and say good bye to any warranty right from brand new. Like was said above...if you're man enough to be able to afford and perform modifications, then be man enough to eat it when you break something. Simple as that!