It's relatively simple 2 x 1" pipes are attached to one each of the exhaust ( not sure if there is 2 for the 4 cylinder engine) it just releases a little noise as some gasses dot travel through the back box. So when I did mine I got more snap crackle and pop and no drone. Well a little.
Trouble is the fitting you will need to remove the back box rill a few holes then weld it ack up. If you close to Oxford I can help out for a bee or 2.