This COBB 3" catted downpipe is a direct factory replacement when used with the COBB Cat-Back Exhaust. It features full 304 stainless steel construction. With three available O2 sensor bungs, the COBB downpipe is compatible with both CCTA and CBFA vehicles. The 4" Flex Section helps to ensure factory-like fitment. An integrated 12" Resonator helps to reduce exhaust drone when paired with a cat-back exhaust.