A girlfriend of mine at school has a 92 civic. the other day she was driving on the freeway when all of a sudden the check engine light came on, she decided she was gonna pull over at the next stop. all of a sudden smoke everywhere from the engine. she pulls over and finds her radiator broke and spilled coolant all over the engine. she replaced the radiator and it is fine now, but for some reason now her aftermarket exhaust can barely be heard anymore, it is so low you cant even tell it is there.. any answers?

does the car runs good? hard to start? weird idling?

she said it is running perfectly now that they replaced the radiator. the only thign is you cant hear the exhaust now?!