obviously if you run a safe tune, and dont beat on it constantly then the lifespan will be longer. however, guys that are putting superchargers and other power adders similar are doing it for a reason, meaning that your gonna be in boost often enough to warant putting the sc on in the first place. this is the reason i havent done it yet, i dont wanna grenade my block and it seems as tho it is a likely possibility without building one with forged internals.