Too bad it had to happen this way, unfortunately, unless a person has a binding contract with the tuner stating that they will give a limited warranty on parts and labour to fix a customers car in the event of a failure, it is not common for them to step up to the plate and cover the cost of repairs to a customers car. I do think it was amazingly sneaky and criminal for them suggest putting the car back to stock and have the repair done under warranty.
I for one believe that a person modifies a car at their own risk. It is one thing to put an exhaust, software or an intake on a car, and most dealers that are mod friendly will over look stuff like that. With a supercharger however, the power increase is quite significant and the software and other fuel system mods to run it are quite a departure from OEM. Basically if a person wants the power levels that are associated with a supercharged M3 and still have a warranty, that person needs to look at buying a different car.
I guess this proves that Gintani went over and above the norm by covering the cost for Drew's engine. No matter what a person thinks about Gintani's parts, what they did in that case was definitely a good gesture on their behalf!
2011 E90 M3 ZCP - Individual Moonstone/Individual Amarone Extended/Individual Piano Black With Inlay:LINK!!!
1994 Euro E36 M3 Sedan - Daytona Violet/Mulberry:LINK!!!