I did some measuring this weekend on the original front brake line (3 line setup/stock) and compared the top line that goes to the bars from the tee. The extra length for the new line that came with the bars vs the stock line is 1.75" longer to accommodate the extra set back and rise in the LSL bar riser kit.
I could not find this information readily available when searching so this should be a good guide for future reference.
stainless steel brake lines, SS lines, bar risers