996-CAB

Here is an option I installed. I did not have to remove anything but the old tube. https://9ii.pro/

FlattestSix

Not even the throttle body or intake manifold?

996-CAB

Argh. You got me. I didn't have to remove anything, but I already had the 9ii product and had to swap out the top half, not the bottom half. My mistake. And the only reason I had to swap out the top half of the 9ii product is that mine was the first test subject and it needed tweaking.