I just recieved my two brothers slip on for Christmas. While taking off the stock exhaust I noticed that there was an extra piece of pipe extending from the flange. When i tried to place the new exhaust on, it would not go all the way on. Has anyone had to cut the extra pipe off while installing a new exhaust? and one other question, what exactly do I put the sillicone on. It said to place it on the gasket, but im not exacly sure what part that is. The sillicone came in the package with the two brother pipe.