@barbagris Baterseas originals posts combined with warps were a big catalyst of ideas. Functionally that setup and mine are quite similar.
The 3D print is from shapeways using their black "strong" material. In reality it's nylon, laser sintered with very fine layer thickness, much higher quality than the normal consumer grade prints. It's quite strong yet still flexible so doesn't crack easily. It's also quite heat tolerant, given the decoupling from the motor the TBs have and the air following through them I expect no heat issues.
An example, the silicone couplers I have are 60mm ID, 3 layers, to get them on they have to slip over the print which is 62.5mm counting the ring for the clamp to bite onto.
It takes some massaging but they go on and are very tight but the nylon is fine with it.
Width is 5.5 overall, length I'll have to measure and update this post with. As it turns out, knee interference depends where I sit, if I'm forward like when riding curves I do hit it some, but better than the K&N 1750s I had on.
I may order the 40mm high filter when I order the first laser cut backplate, I think it can work, but need to look at my drawing. It would make the claw trimming very minimal.
Edit: Dimensions are 16 5/8 long by 5.5 wide, in inches.