Single Turbo to Twin Turbo Upgrade?

Terminal Doc

Hello everyone,

Hopefully Im not making a repeat thread and tbh this might just common sense, but I've thought about going single turbo, but then eventually upgrading to twin turbo. Ive been trying to research it everywhere but have no found a solid answer. Really Im looking for:

Single Top Mount vs Single Mid Mount ease of upgrade to Twins?

Cost?

What piping or extras will I need to make it happen?

Will there be welding required?

Will it vary between the companies or will there be an impact if they don't have the required items to make this happen?

Thank you for your assistance.

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