i bought a new catback exhaust for my 95 civic dx coupe, i took the old muffler off and it is shot, the new muffler to bolt on has a new gasket with a flat surface, but where im bolting it is not flat, so i guess im goin to take it to a shop to let them put it on, can i drive this car without a muffler for a day or two, will there be enough back pressure, i started it and it ran fine without the muffler

 

Yea it'll run fine.