Roof mount or do individual mounts and ditch the manifold/mount. 
Just kidding. I stacked two K3’s on a K5 and took a picture. They aren’t bolted together.
That’s just being greedy lol 
Great pic tho!
That’s what I get for not paying closer attention!
Go on… where’s the sound clip of them all going at once. Don’t tell me you weren’t tempted 
… bet it sounds terrible!