I want to use a pair of nice alloy velocity stacks on my RS/TM 34 carbs. The bellmouth on these stacks is 3", but so far I haven't found any pod filters that will not to some degree mess with the airflow improvement that I hope these stacks will provide. I even bought a pair of UNI UP-4300, only to find that they have a quite abrupt ridge inside the neck, that maybe has an ID of 65-70 mm. Which made sense, once I realized the filter OD is only 3 3/4".
For anyone interested, it is the longest version of the stacks found here: https://www.mikuni-topham.de/DEUTSCHSITE/Deutsch/FRAMEDEUTSCH.html
I have already made a smaller battery box from 2mm alloy sheet, creating space for stacks and filters.
So what I need help finding, is a pod filter with 3" neck ID, no internal ridge or stop smaller than 3", max 4" long and max 4 3/4" OD.
For anyone interested, it is the longest version of the stacks found here: https://www.mikuni-topham.de/DEUTSCHSITE/Deutsch/FRAMEDEUTSCH.html
I have already made a smaller battery box from 2mm alloy sheet, creating space for stacks and filters.
So what I need help finding, is a pod filter with 3" neck ID, no internal ridge or stop smaller than 3", max 4" long and max 4 3/4" OD.