As far as I know, my early LrA install may have been the first to swap for a faster pump. It was a pump I located and ordered at the time and Yes,it did require a relay. Georg and crew installed it at Valley hybrids, so I can’t offer a step by step. It’s been 100% reliable.
If you are interested in the pump I used, I should be able to post a link..
Zero issues...faster & quieter. Quite a bit faster, actually, which is nice.
I believe Slee may be switching out the included fill tubes and possibly the pump as well. Not sure on the pump.
To me, the LRA is a fantastic mod. Worth every penny...and changes the way you travel in surprisingly helpful ways....whether on road or off.