▁three ▁c ogs ▁than ▁the ▁Im pre za ▁W R X , ▁but ▁a ▁shorter ▁ 4 . 1 1 : 1 ▁final ▁drive ▁ratio ▁coun ters ▁some ▁of ▁this ▁effect . ▁The ▁g ears ▁are ▁now ▁cold ▁for ged ▁and ▁shot ▁pe ened ▁for ▁added ▁strength ▁and ▁a ▁flexible ▁fly w heel ▁design ▁is ▁now ▁incorpor ated ▁to ▁reduce ▁engine ▁v ibration ▁reaching ▁the ▁dri vel ine . ▁The ▁pull - type ▁ 2 3 0   mm ▁single ▁plate ▁cl utch ▁has ▁increased ▁tor que ▁capacity ▁thanks ▁to ▁an ▁ 8 3 0   kg ▁cl amp ing ▁load ▁pressure ▁plate . ▁ ▁The ▁B 4 ' s ▁A WD ▁layout ▁is ▁traditional ▁Sub aru . ▁The ▁vis c ous ▁limited - s lip ▁centre ▁coupling ▁app ort ions ▁front - to - re ar ▁tor que ▁ 5 0 : 5 0 . ▁Tor que ▁distribution ▁at ▁the ▁road , ▁however , ▁is ▁dependent ▁on ▁load ▁distribution ▁and ▁ty re ▁g rip . ▁As ▁a ▁result , ▁the ▁static ▁straight ▁driving ▁ratio ▁is ▁ 6 0 : 4 0 ▁front - to - re ar . ▁Under ▁dynamic ▁driving ▁conditions , ▁however , ▁the ▁tor que ▁distribution ▁var ies ▁accordingly . ▁The ▁vis c ous ▁coupling ▁sens es ▁rot ational ▁speed ▁difference ▁between ▁the ▁front ▁and ▁rear ▁ax les ▁and ▁transm its ▁tor que ▁to ▁the ▁end ▁with ▁the ▁most ▁g rip ▁( which ▁has ▁less er ▁ax le ▁r pm ). ▁ ▁A ▁rear ▁vis c ous ▁L SD