- air ▁design ▁- ▁is ▁integrated ▁into ▁the ▁int ake ▁pl enum , ▁to ▁reduce ▁the ▁volume ▁of ▁air ▁between ▁the ▁tur bo char ger ▁and ▁the ▁cyl ind ers . ▁ ▁As ▁per ▁the ▁N 5 5 , ▁the ▁B 5 8 ▁also ▁features ▁a ▁single ▁tw in - scroll ▁tur bo , ▁direct ▁fuel ▁injection , ▁variable ▁val ve ▁timing ▁( called ▁double ▁Van os ▁by ▁B MW ), ▁variable ▁val ve ▁lift ▁( called ▁Val vet ron ic ▁by ▁B MW ). ▁The ▁red line ▁remains ▁at ▁ 7 , 0 0 0   r pm , ▁the ▁bore ▁and ▁the ▁stroke ▁is ▁. ▁ ▁The ▁B 5 8 ▁also ▁features ▁an ▁engine - mount ed ▁heat ▁enc aps ulation ▁system ▁to ▁reduce ▁engine ▁wear ▁and ▁em issions ▁during ▁start - up . ▁ ▁As ▁a ▁part ▁of ▁B MW ' s ▁new ▁mod ular ▁engine ▁family , ▁the ▁c rank case ▁is ▁a ▁completely ▁new ▁design ▁identical ▁to ▁the ▁B 5 7 ▁dies el ▁version , ▁engine ered ▁as ▁both ▁a ▁gas oline ▁and ▁dies el ▁engine ▁in ▁one ▁common ▁part . ▁The ▁closed ▁deck ▁c rank case ▁is ▁equ ipped ▁with ▁a ▁completely ▁new ▁structure ▁which ▁can ▁be ▁identified ▁by ▁a ▁complex ▁array ▁of ▁rib s ▁on ▁the ▁exhaust ▁and ▁int ake ▁side ▁and ▁an ▁additional ▁rein for cement ▁frame ▁on ▁the ▁oil ▁p ump ▁side . ▁ ▁Mod els ▁ ▁B 5 8 B 3 0 M 0 : ▁ 2 4 0 ▁kW ▁( 3 2