The Cookies ran out convincing 57-15 winners over their Limerick counterparts thanks to tries from Liam McMahon (4), Josh Boland (2), Tom Walters, Kelvin Langan and Josh Costello with Langan kicking five conversions and Jeff Williams one.
Jake Connolly and Sam Birrane touched down for the visitors with Adam Guerin kicking a conversion and a penalty.
Next up for Young Munster is a quarter-final clash with UL Bohemian on Saturday, September 5 at 2.30pm.
Other Limerick sides in quarter-final action include: Garryowen taking on Clonmel and Shannon taking on Cork Constitution, both ties kicking-off on Saturday at 2.30pm also.
Photographer Dermot Lynch was on hand to capture all of the colour and excitement from last week’s clash between Thomond and Young Munster.
5. The push is on with Thomond's Colin Slater keeping possession
Dermot Lynch
6. Thomond's Shane Kelly secures this lineout ball
Dermot Lynch
7. Thomond's captain Luke Fitzgerald charges at the Young Munster defence
Dermot Lynch
8. Young Munster's scrum half Kevin Langan looks to get the ball away
Dermot Lynch