its actually fairly common once the vehicle is over 100k miles, esp if the precat is original. like said once it fails, the ceramic could potentially get sucked back into the motor under 'certain operating conditions', which will score the motor internals. remember, there is no egr on your vehicle! its bad enough they send me plenty of 'safety notices' and hand them out at every inspection each year. the precat and butterfly screws are NOT hyped up items, they are basically ticking time bombs. i mean, its up to you to decide whether or not you should take care of them. cheapest header from ebay +gaskets, nuts, bolts, springs, whatever can still range around $100 as the cheapest replacement, and that includes loctite for the butterflies. if you dont have $100, you could always gut out that precat as well, ie remove the ceramic plates from inside the manifold. do not gut your precat if you live in cali or another state that requires smog tests, you should swap to your precat for when you need to inspect the vehicle.