The new EPA fuel tanks are designed to let air in but not allow air and vapor to escape. They didn't have brains enough to consider that when a fuel tank warms up that it will swell up like a dead pig and create upwards to 60psi of fuel pressure in the fuel system, which is more than enough to blow needle valves off their seats, blow holes in fuel pump diaphrams, and rupture fuel lines. So not only is VAPOR going to escape into the atmosphere.....Raw Fuel will too.
The new age fuel hoses with the vapor liners won't last a single year before the liner collapses inside the hose, causing a fuel restriction. Absolutely ignorant (and dangerous) engineering. I can't believe the stupidity being displayed these days, and the audacity to charge 300% extra for it.