while im on a posting roll. some pics of mine

[Cyclonium]

4-1 give more top end but doesnt help power low down at all.

A 4-2-1 would be my preffered option on a road car as it shows gains thoughout the powerband but you wont see as high a peak gain.

If you have an all out drag car,high lift race cams etc etc then go 4-1 as it is suited to what you are after.

If your running b16b cams and a daily drive for example id go with a 4-2-1.

At the end of the day when you pull away from the lights, a bit of torque and lower down bhp gains will help more than any amount at peak.