Hi can anyone help please. I have a 1996 sti that I've had for the last 10 years it's a de cat and so will not pass an mot my usual friendly tester is unable to test at the moment as he is waiting for his new equipment. Any ideas. I dont want to spend any more money on changing the exhaust. I'm in two minds to sell it tbh.

 

Put the standard cat on ? borrow one ?