The black round thing on the left. Remove the top bolt on the far left and the the one the line facing the firewall. Then loosen it fro the base. Reverse your steps for install. Make sure you put a rag around the base to collect the gas that's going to spill out. It won't spill for long. Your new filter should come with the washers. I'd use them and discard your old ones. They're tiny and thin so you might wanna be careful with them.