can anyone tell me what sort of thickness wall tube is used on the manifolds for bike carbs - eg bogg bros?

Assuming a N/A engine... I would use 1.6-2mm alloy ....

Its really just got to be strong enough to support the bits and pieces...

i prefer to use 2mm alloy, its better to get a good weld on too.

Joe

2 inch alloy scaffold tube
Denis Aka........Denis.