These boxes are made to be the exact size of the oval filter on the Weber and Delorto carbs. These allow you to use a remote filter. The six inch box is the same size as the 6" filter and will bolt right on useing the lid you have now. If you have duals and want to tee them together I have made a 8" box to get over the cooling tin. I do not have gaskets yet, but they are easy to make from gasket material you can get at any parts store.
I do not have firm pricing yet but if you are interested let me know We will work something out.

$$$$ let me know.