VZ 6ltr drone problem

[Pawly]

Hi everyone, I have a problem. I have put on a single 3 inch cat back system and hi flow cats on my 6ltr and although it sounds nice it has this massive drone through the wagon when accelerating. If I accelerate hard it sounds excellent but if a public officer hears it I get pulled over. If I accelerate normally the drone is there until I get up to speed.

My question - If I change it to a 2&1/2 inch system will this drone dissappear or is the drone a byproduct of having a bigger exhaust?

[aaronevolution]

I have a twin 2 1/2 inch on my 6 Litre, I guess there is a little bit of drone but not as bad as I have heard on other cars.

[Lumps of cheese]

Wagons tend to drone more than sedans regardless.