VZ Exhaust Help???

[disco78]

I've got the VZ thunder 6 liter, Automatic
Had exhaust bros do the cats back and put two pipes out the back with dual tips to look like the VE's. But I get a terrible drone noise in the cabin when the car is under load but not high revs. Any ideas how to make it get a good note but no drone noise???
Cheers

[richardpalinkas]

drone is the note at which the exhaust pipe resonates. only way to change the drone is to change the characteristics of the pipe, whether that be shortening/ lengthening the pipe, reducing or expanding pipe sizes etc. my guess is that it has no rear muffler? if thats the case, maybe add some hotdogs to the back, or a muffler.

[disco78]

Thanks.
It has a little hot dog muffler on the back, I've received a quote to put a bigger muffler on the back but I think that might reduce the note of the car. I was hoping to keep a little bit of that V8 sound.
Any ideas on how to get a great note but not the drone?

[richardpalinkas]

what system is it?custom or off the shelf? twin 2.5 or twin 3?

[disco78]

I believe it's custom 2.5 inch