Tested...
A 12mm 3/8" drive u-joint socket or a 12mm 1/4" drive socket on a 1/4" u-joint adapter both fit mine. The 1/4" setup maybe a little better but either would work in my case.
That said, to me it looks like the heat shield is closer on those pipes than the V&H Powershots on mine, but hard to say for sure from the pics.