Lahiff, 23, has agreed a two-year deal with the Australian Super Rugby franchise, and he will head Down Under in June. Lahiff, who qualifies to play for Australia through his father, joined the London Irish academy in 2009 and has made 59 first team appearances.
"Max is a terrific player and a young man with great values," Irish rugby director Brian Smith said.
"He will do well at the Rebels and may go on to play for the Wallabies.
"He has played hard for us all season and he will always be welcome back at the club as a player."
- Sports & Recreation