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AllDayJonRay
The fact that your dealer is willing to perform warrantied engine work on a car that is known to be boosted is fantastic; that they only are requesting you return it to a OEM-like workable condition shows a lot of maturity and responsibility on their part. If it's a known warranty/TSB issue they really should honor it, regardless of what's been done to the car (within reason). I wish more dealers were like this.