1. Ituaiga Catalyst: Platinum, palladium, rhodium, ma isi uʻamea taua ma elemene eleele seasea o le catalyst faʻapipiʻi.
2. Su'ega fa'atosina: Mea fa'ameamea fa'ameamea, mea u'amea.
3. Faʻapipiʻi lelei mo le faʻamalosi, tumau ma faʻamautu faʻatinoga catalytic.
4. Fa'atekonolosi fa'atekonolosi ma auala fa'apipi'i e fa'amautu fa'atuatuaina te'i vevela ma mautu fa'ainisinia.
5. Eseesega, faʻamatalaga atoatoa, manaʻoga o tagata faʻatau ma e mafai ona faʻavae i luga o faʻataʻitaʻiga faʻapitoa mo le faʻafetauiina o manaoga eseese o tagata o tausia.
6.E mafai ona faʻafeiloaʻi Euro3, Euro4, Euro5 poʻo CARB, EPA tulaga.