Originally Posted by rao
Look at the Lachute
which has been out for 7 years or so.
and which you can see right here
. Can't say the fit was perfect - the OEM DP/res and supplied res/Y bolts were too short for one thing - but it eventually went on fine. I too am interested in the 2.5" DP to 3" mid adapter as I just replaced my gasket with a bit of a kludge consisting of a 3" metal gasket plus foil tape. Lachute's solution, which is really good for only one install, was to supply a thin metal ring that went over the donut gasket. Like a squish washer it collapsed on install and couldn't be (or in my case shouldn't have been) reused.