When replacing my muffler (95 Civic EX), is it necessary to get the flange and replace the springs when attaching it to the pipe between the muffler and the cat. I want to just cut those off and run a straight pipe instead of having the flange. I cannot get a good seal because of the amount of rust on the existing exhaust tube.

 

it should seal up pretty good, i no mines rusted pretty good and it still makes a good seal once you put the bolts in tight, and you dont have to replace the springs, you could if you want..they get rusty after a wile..or you can put in a pipe, make just theres no laws about that in your area