Hi All,
After not finding anything suitable on the market in terms of stub stacks that fit inside the K&N cone filter I made my own about 10 years ago. I have recently offered these for sale and had some batches of HS4 (1.5") and HIFF44 (1.75") sizes made.
I have 5 of the HS4 size left. If there is any interest I would get another batch of the HIFF 44 size made. I've already got some interest for another batch.
These are £30 plus postage.
Get in touch if you are interested.
Dave