it very much depends how u tune the engine. if u want top end 4-1 gives a bit more flow at higher rpm. if u want more mid range 4-2-1 gives more mid range. i have 4-1 on my sprinter but i have a gze so that suits me well as i get the power from the charger from low - mid ut then i get cams the 4-1 will allow the cams to play a higher roll than the charger at higher rpm. or maybe i have it around the wrong way. either way it very much depends on how u want to tune the engine.
