the rs is the absolute bare bone evo..... this is what the rs package includes: aluminum hood, fenders, roof, trunk, no abs, no trunk carpet, no radio, manual windows and locks, rear trunk bar, no spoiler, and only 2 color options.. it is the bare "race" ready evo... while the gsr, mr, have steel roof and fenders, roof, trunk, they have abs and radio power windows and door locks.