Just wondering because toyota is famous for reliability... My aunt had an 1987 toyota MR2 not modified and it lasted for 320,000miles before she traded in on another car and it probably would still be on the road today because all it need was a tune up and check some gaskets... Thanks >>

It depends on the type of modifications that you do. An exhaust system isn't going to affect your reliability, except for the fact that you'll probably drive your car harder once you have your exhaust. >> A turbo kit, on the other hand, will make your engine wear faster than if it was naturally aspirated.