▁back ▁to ▁four ▁head light s . ▁A ▁ 4 - door ▁not ch back ▁sedan ▁( known ▁as ▁C ut lass , ▁C ut lass ▁L S , ▁and ▁C ut lass ▁Br ough am ) ▁replaced ▁the ▁un pop ular ▁ 4 - door ▁" a er ob ack " ▁Sal on , ▁which ▁continued ▁in ▁two - door ▁form ▁for ▁one ▁more ▁year . ▁The ▁Supreme ▁Br ough am ▁package ▁was ▁available ▁on ▁and ▁off ▁throughout ▁ 1 9 7 8 - 1 9 8 8 ▁production . ▁ ▁This ▁was ▁also ▁the ▁first ▁year ▁G M ▁introduced ▁the ▁O BD - I ▁computer ▁controlled ▁engine ▁management ▁and ▁emission ▁control ▁system . ▁ ▁The ▁ 4 4 2 ▁option ▁moved ▁from ▁the ▁aer ob ack ▁C ut lass ▁Sal on ▁cou pe ▁body ▁to ▁the ▁not ch back ▁C ut lass ▁Cal ais ▁for ▁ 1 9 8 0 , ▁with ▁content ▁upgrad ed ▁from ▁a ▁mere ▁" app earance ▁and ▁handling " ▁package ▁back ▁to ▁a ▁legit imate ▁performance ▁option ▁with ▁content ▁similar ▁to ▁the ▁ 1 9 7 9 ▁Hur st / Old s ▁including ▁its ▁ 3 5 0 ▁Ro cket ▁V 8 . ▁This ▁would ▁be ▁the ▁last ▁ 4 4 2 ▁until ▁that ▁model ▁was ▁rev ived ▁in ▁ 1 9 8 5 ▁again ▁on ▁the ▁C ut lass ▁not ch back ▁body ▁as ▁a ▁successor ▁to ▁the ▁ 1 9 8 3 - 8 4 ▁Hur st / Old s . ▁ ▁In ▁