The web site says "The Dual kit is for SU or ZS type manifolds and consists of 2 HSR42mm or 45mm carbs modified with extended throttle shafts,smaller float needle and seats, and larger main jets and the kit includes manifold adaptors and linage to connect to the stock rod or cable type throttle linkages."
I would like to see if anyone has tried these because I am more familiar with those carbs and how to tune them than the SU type carbs. I attached a picture of them on a L16 in a 510 that was on their web site.