Diesel cats aren’t worth the effort, prices don’t change much current value today is sub £80 as show here from my account page
V6 models however have KAT001 and KAT002 with a combined total of circa £260 so those are the ones at risk, don’t replace any catalytic converter with an aftermarket cat as they are absolutely worthless and don’t last very long in my experience, I remember working out the scrap value at around £6 😡😡😡 tells you everything
Mick