replacing PS pump, should I also replace lines?

[YELOSNK]

Finally getting around to replacing the PS pump before my next track day. Should I also replace the lines (esp. high-pressure lines), or if they aren't leaking is it better to not mess with them?

 

[Bullitt1448]

If they are not leaking, no need to change them. Make sure they are cleaned well though, you don’t need any contamination in there.