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.
1. Adam Moynihan with James Buckley and Sam Brown, Thomond RFC
Dermot Lynch
2. Young Munster's Josh Boland gets over the try line while being tackled by Thomond's Eoghain Sherlock
Dermot Lynch
3. Thomond's Sam Birrane tackles Young Munster's Joshua Costello to the ground
Dermot Lynch
4. John and Debbie Gorey supporting Young Munster
Dermot Lynch