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				This is the Cat that came with my car.
ive never seen a standard cat. but i don't think their supposed to have this triangle flange on the back end ?
My apparently BTB exhaust has the same fitting on it.
the pipe after the cat (but before the flange) is 2.5" diameter as well
(my De-cat has the same fittings as well)
	
	
	
		
		
		
			
		
		
	
	
		
	
			
			ive never seen a standard cat. but i don't think their supposed to have this triangle flange on the back end ?
My apparently BTB exhaust has the same fitting on it.
the pipe after the cat (but before the flange) is 2.5" diameter as well
(my De-cat has the same fittings as well)