2005 Honda Civic SI EP3-l
First off,the staff at Auto Anything was very knowledgeable and super friendly. The Catalytic arrived on time. The gaskets were included with the system. I used the donut gasket but it went on very loose. After two weeks I developed a small exhaust leak at the manifold connection. I went to my local Honda dealer and picked up the OEM donut gasket for $30 dollars. A little steep, but it fit so much better than the one provided by Magnaflow. Save yourself some time and buy the OEM gasket.