The home team had fly-half Johan Goosen sent off after 54 minutes for a dangerous challenge and Munster kept their composure to claim an outstanding win.
The Red Roses amassed 14 tries in front of 48,778 fans at Twickenham.
Leinster have played a number of games in the Aviva Stadium over the years, particuraly in the knockout stages of the Champions Cup
Owens played 91 times for Wales
The Irish province have pulled off a major coup by signing New Zealand’s brilliant centre.
He can play at centre, full-back, out-half and wing, and is also another kicking option for Leinster.
Toulouse's vast European experience proved too much for Rob Baxter’s youthful side
Tipperary beat Galway 1-13 to 0-15 at Croke Park to claim the Very National Camogie League Division 1A title
A near-perfect showing from Ross Byrne earned him Man of the Match
Leinster beat Ronan O'Gara's La Rochelle side 40-13 at the Aviva