Parts - Turbo pipework - Murray aviation hose clamp

Not cheap but these clamp superbly using multiple ribs running around inside of clamp face (fluid pressure sealing is always best using several stages, and it helps simple frcition gripping too)

.. plus these use a tension balancing system so that the radial clamping force is almost 100% uniform through the whole 360 degrees, unlike many other hose clamps, especially those with a small radius.

Murray aviation hose clip (US)