I was wondering if the Weber Isolators were interchangeable with the Mikuni Isolators. Pierce Manifolds sells two types, the smaller round ones and the mounting block type http://www.piercemanifolds.com/product_p/z70-216.htm. 

I was wondering if the Weber Isolators were interchangeable with the Mikuni Isolators. Pierce Manifolds sells two types, the smaller round ones and the mounting block type http://www.piercemanifolds.com/product_p/z70-216.htm. 

Mikuni mounting blocks are likely to interfere with the DCOE cold start circuit that pokes out the back. I had a buddy run into this. You can run them but you'll have to give them a trim.

 

I'm using the Pierce mounting blocks on my DCOEs but strangely enough the shape of the rubber gaskets is different (you can see it in the photos). i suspect the gaskets come from some other Weber application. I trimmed the rubber gaskets to match the mounting blocks.