OEM dv pipe work diameters?
 

Still having running issues and having bodged the original DV with a temp measure of electrical tape wound tightly to increase diameter the car behaved better. I have an autobhan front mount with a Atmosphere DV.

I need pipe that will fit the the front mount to the dv and then I also need a standard dv to engine pipe as the one on the car had a massive bung so must be a different hose.

Where can I get these and does anyone know the actual diameter of the standard DV and aftermarket (HKS VTA). I can measure myself if need be, but where to buy from would be a great help.

So far changed MAF, IACV, o2 sensor, and next up plugs. Damn bad idle and cutting out.