Car has been off the road for just over 3 months ( long story ) but I’ve got the EML light on with fault code P0420 ( catalyst system bank 1 efficiency below threshold ) so it looks like the cat is on its way out and not doing it’s “job” ( was also flagging this up intermittently before being off the road ) is there a sports cat I can do a direct replacement with ( any links appreciated ) as I want to keep the car OEM without any straight through pipe and mapping ? Cheers all - Leo