Generally speaking, I cannot imagine ANYONE at ANY point of ANY process has ever considered the evaporative canister or its location when considering competition weight. If that is a part of the process - or even considered as part of the process - then there needs to be a "subtractor" for all cars (the vast majority of them) that have these canisters safely tucked up in the fender wells of the car, where they can't possibly affect vehicle performance...

Said differently, if removal the evap canister is considered a performance enhancement, then it needs to be applied - or adjusted - equally. But it ain't, so it ain't, so just allow the thing to be removed*.

GA

*Rallo has a valid point about needless hydrocarbon emissions; it goes along with our prior discussions of needless exhaust noise. However, I suggest with all the IT-allowed mods, the canisters are generally not likely to be working correctly. Even if the hydrocarbons were being captured in the canisters, you still need to have the rest of the system connected so those captured hydrocarbons are being pulled into the intake and burned; without that, you're just delaying how long until they eventually get released into the atmosphere...