its entirely possible - pretty unlikely, yet possible - that a factory turbo car would explode under the right conditions. its happened more than once on dynos, even stock. if the right amount of excessive load combined with other conditions is placed on said car, anything can happen.
it is 5000 for the built block we offer
Very true, but highly unlikey in this case where a "custom" intake and boost controller was used.
And how much is just a stock short block cost from Mazda?