They will deny coverage on the entire powertrain. Because you've now asked the clutch/trans/diff/halfshafts/etc to operate at a power level higher than specified from the factory.People have posted a couple times about denials because of tunes. I would assume if you run a tune your engine warranty is gone.
The modern day PCMs supposedly contain the VIN and a lot more ‘As Built’ info.... it’s not like years past where one could swap an A9L into another Mustang. Back then there were no “ties” or internal verifications embedded into the hardware to do a check on what it was being hooked up to or swapped into...What about swapping out the factory PCM with a secondary PCM? IF you need warranty work, then you can swap the EOM PCM back in the car.
Short answer is no.Would a borla atak catback also void the warranty? It does mention exhaust and it is not a Ford part.
The crank isn't the weakpoint.... And aren't the internals already forged? If you want to really boost one just gap the rings and lower compression a little.Time for an upgrade to an engine that has a CPC and forged internals