The cats are history.

 

Ouch! Yeah it is the led that will kill them fast. Like BLKMGK said, if you were running pig rich that could do it too. But it is the led that is a real killer. I'm sorry to hear that. If it was 100octane unleaded you would have been fine.

 

I swapped the 600cpsi cats of the stock muffler for 100cpsi race cats. Easy job for any exhaust shop. In ebay you can find plenty race cats. Despite europipe saying in their website that stock cats has 118mm diameter, i realized that the true outside diameter is 130mm.

Since you have a ecu flash and like to run with race fuel, i would try first straight pipes over cats with a ecu update to run cats-deleted without any warning light.

 

You most likely damaged your spark plugs with leaded 110 octane.

 

He didn't 'damage' his spark plugs by runnnig leaded gas. He may have fouled them, but it doesn't happen instantly. Even my NTK wideband has put up with thousands of miles of leaded gas.

 

FVD Brombacher utilizes a modular system as well. Pb will definitely poison your cats to their demise. Cats are like women, they attach themselves to expensive metals like platinum.