Boima ba koporo bo boholo ho feta lisebelisoa tsa Aluminium empa bo nyane ho feta tšepe e entsoeng ka tšepe le tšepe e entsoeng ka tšepe. Kahoo ho bonolo ho khomarela lisebelisoa tsa ho itšeha nakong ea machining. Hangata tšepe ea alloy e phahameng e ka sebelisoa e le lisebelisoa tsa ho itšeha bakeng sa machining a koporo. Brass ea ho lahla e na le lisebelisoa tse phahameng ho feta boronse, empa theko e tlase ho feta boronse. Cast brass hangata e sebelisoa molemong oa ho jara lihlahla, lihlahla, likere le likarolo tse ling tse manganga le li-valve le likarolo tse ling tse sa jeng. Brass e na le khanyetso e matla ea ho apara. Hangata koporo e sebelisoa ho etsa li-valve, liphaephe tsa metsi, liphaephe tse kopanyang bakeng sa li-conditioner tsa ka hare le tsa ka ntle, le li-radiator.