The canister bracket actuall mounts onto the inner fender & it is just a tank that captures fuel vapors from the tank & carb ,then when the car was started it draws in air throught the canister & burns off the trapped vapors , what is rediculous is how much vapor is released into the atmosphere everytime the fuel tank is filled replacing vapor with liquid , even on todays vehicles where they have sealed systems & pressurized testing done to be sure the system is sealed far more vapor is released into the atmosphere just filling the tank every time itme than the vapor capture would have any effect on .... the insanity continues LOL