rx7mcd

I'm looking to replace my mufflers because my drivers side muffler is in some bad shape some how,since I don't drive the car hard......anyways I was wondering what is the size of the piping so I can do a swap. Also would it be wise to just get a full exhaust system or just replace the mufflers that arent too expensive and save up for the Bonez superflo system?

Thanks for the Help.

(If it helps the car is a '91 vert)

Turbo11

i vote full exhaust.