Let me put it this way, we installed an F-MAX kit on my friends civic when it had close to 80,000 miles on it... Yeah that was in 99... 3 years later, still rollin' around on stock internals running 13lbs of boost on the street and still running 12's (haha, we all are!!!
) He doesn't even use his turbo timer no more, unless we go on long trips...
I must say though, compression and leak down test before you put it on and at least every month or 2 after. Make sure you replace all the gaskets and belts... Timing belt especially. And the best upgrade you can do if you're gonna run stock internals is get a thicker headgasket. F-Max gives them with their kits now, free of charge. heheh, wish they were doing that when i bought mine!!! Make sure that you retard the timing .1-.2 per lb. of boost. And just have enough fuel and change the oil with synthetic every 2000...
Turbo definitely ain't a toy but if you treat it good it'll treat you good!!!