Originally Posted by 
twr7cx
				
			 
			
What are you repurposing the EGT cooler to do?
Better still, just replace the factory cat converter with a good quality high flow unit. Pretty much achieve the same flow as a straight through pipe, while still being emission compliant and helping the environment impact. Better than most of the aftermarket decat pipes as you retain the larger pipe ID.
Block it off. Many different ways to do it but I think the easiest is follow it back up until you get to the white plastic t-piece, remove that and replace with a straight joiner.