That isn't what I had in mind but...looks kinda nifty! Can you quote me here or in a PM?
Seems all of the filters I like are thread on to Amal carbs.
My carb bolts directly to the head but yours has a piece of hose connecting it?
All Bullets have a hose connecting the carb mouth to the airbox.
All India made Bullets have a short hose connecting the carb(Mikarb 28mm) to a manifold stub on the head. That is the way all the Mikuni carbs attach.
Amal carbs have a flange that bolts to the head. This flange is extremely delicate, and overtightening it will warp the carb body permanently, causing unending problems. So, don't overtighten the carb flange bolts, and pray that the previous owner didn't overtighten them.
In any case, regarding my Ace Air Canister, it fits both the Mikarb and Amal carbs, and replaces the stock airbox and filter, and mounts to the original airbox mounting bolt.
The reason for using an airbox is that it has sufficient internal air volume so that the engine can fill the cylinder with air from inside the airbox without having to pull air thru the filter mesh. Then, the air can come thru the filter mesh during the next 3 strokes and be ready for the next intake stroke. This allows better throttle response and cylinder filling potential. The intent for this kit was to meet all the desired requirements for its purposes, and replace the poor OEM filter/airbox arrangement with a better one that keeps a vintage appearance.
The pod type filters that clamp/bolt on the carb mouth do not have sufficient internal volume for the purposes described above. They work, but are not ideal, which is why all factory engines use an airbox, and so do most aftermarket intake/filter systems that offer real performance benefits.
The kit is $89.95 plus shipping. I have sold hundreds of these over the last 10 years. If the Photo Gallery on this forum was still working, you would see many members bikes with these on them. The photo I posted was of another member's bike that put an Ace Air Canister on it, and posted a photo after he installed it on his bike. That photo is almost 10 years old now.
You can PM me if you want to order one.