evo,s from 1 to 4 can get crankwalk, this is cus mitsu dident design the main bearings correctly and this can starve the main bearings from oil, the fix for a evo 4 is to put a evo 5 block in and use the new bearings, evo.s 1 to 3 cant have the 5 block as from 5 onwards the engine was put in the oppisite way around, but all evo,s from 1 to 9 have the same 4g63t engine in and thats why i can use evo 9 pistons and rods.. i also used the best main bearings i could buy ..full race bearings.. but it still cant stop carnkwalk