Where are you seeing that? link?
But I can tell you the DT 1st and 2nd gen and the JBA's are not equal length....not even close.
As of yesterday the description for the Thorley longtubes did state the they were "equal length tubing", but just went back to post the link 10 seconds ago and looks like the info on that page has been changed already (the line that stated this has been removed. I gueass nevermind for the mis-information - I gurantee that it did say that yesterday. :hmmmm2: