First of all, who would sell their beloved stang! thats just crazy talk! 2nd, rip that **** out if you don't have emissions in your state! i took all mine off, and there has been no problems. Mind you, it was for looks and weight not hp.... you won't see much, if any hp gains. Make sure to cap the vac. lines, crossover, and your heads, and u should be fine.Leave the cannister though. it doesn't hurt anything. if u do want to ditch it, get a gas cap that vents, or you could f* up your gas tank!