Top hat collar on it needed? - Alfa Romeo Forum
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Top hat collar on it needed?

Hi there, when I replaced my standard shocks with the B12 kit a few years ago I simply swapped all the ancillaries over.

When replacing the upper doughnut the other day I had a rethink on the little top had collar that's fitted over the damper. Is it needed, what does it do?

The doughnut is a snug fit on the threaded part of the damper so doesn't pass over the shoulder. The top hat is mounted right way up, meaning it passes through the hole in the mounting plate, the brim of the top hat then rests on the underside of the plate.

I can't quite see what it's doing, without it under compression the doughnut would bear down on the damper, as it is the mounting plate (and maybe still the doughnut to an extent) is pressing the damper down.

Is it a part I shouldn't have swapped over?

All the best


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Not an Alfa :-(

I can only speak for Koni dampers, but the top hat prevents the shock absorber rod pushing through your top mount and 6then your bonnet!. No idea if you need them on Bilstein kit.
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I'm guessing it's a vibration damper, to reduce the transfer of road vibration through the suspension.
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collar , damperis , hat , needed , top

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