Most true classic car restorers are interested in rebuilding a car's original engine or finding an exact, period-correct replacement. Usually, the home restorer will "yank" the engine out of a car, disassemble it, take it to a machine shop for machining, find or order new parts, install the new parts after the machine shop is done, put the rebuilt engine back in the car and test and tune its operation. The MG T series are some of the favorites among classic pre-war sports car rebuilders.