hi, if i changed the muffler, should i change the resonator and the pipe too?

i think my resonator is about time to be replace, cause its making vibration sound inside when i step on the has, so is it necessary to replace?

also if i just replace the 2.25" pipe, resonator and muffler after the cat, like the mid section to the end, is it good enough?

by the way, i have a 98 civic ex!!

thanks you!!