These are our merge collectors. Looking at these closely you can see the merge in the middle of the collector allowing for a smooth flow from the pipes.
These collectors are all hand fabricated from separate bent tubes. They are finished off by Tig welding the component together, but not forgetting to gas purge the collector.
Gas purging is when you fill the component with a flowing pressure of pure argon. This enables the weld to be purged and not become brittle and oxidised. This also makes the weld on the inside as smooth as the outside.