Quattrini exhaust

Hi can someone tell me how much modification is needed to make a TS1/ iron barrel exhaust fit the Quattrini barrel?
Many thanks in advance
Gary
Many thanks in advance
Gary
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https://www.ilambretta.co.uk/forum/viewtopic.php?f=7&t=12715
lozmondo wrote:The exhaust port is back facing like an RB,