Eoghan Grace returns to the side having limped out injured when Connacht visited here in February and he links up with Tommy O'Donnell and skipper O'Mahony in what looks a potent back row.
Duncan Williams and Cusack maintain a partnership at half back that has served their side so well while Sean Scanlon - a bench replacement last Sunday - and Danny Barnes have the sort of pace to stretch the Ulster defence.
Ulster Ravens coach Neil Doak travels his squad with a fair degree of confidence. "Training has been going really well this week. We all know the experience Munster have. They have a big squad that they can rotate, which feeds into their A team.
"It is always hard travelling to Thomond Park to play Munster. With the British and Irish Cup game being played before the Magners League Munster v Ospreys, there should be a great atmosphere for the players.
"This is the younger players chance to shine on a big stage. If we perform well and do the basics well, we have a good chance."
Munster: Mossy Lawler (Shannon); Ronan O'Mahony (Garryowen), Danny Barnes (Dolphin), Jeremy Manning (Cork Con), Sean Scanlon (UCC); Declan Cusack (Thomond), Duncan Williams (Cork Con); Dave Ryan (Dolphin), Mike Sherry (Garryowen), Stephen Archer (Cork Con); Dave Foley (UL Bohs), Ian Nagle (Cork Con); Tommy O'Donnell (UL Bohs), Eoghan Grace (Shannon), Peter O'Mahony (Cork Con) capt. Replacements: Dave Kilcoyne (UL Bohs), Sean Henry (UL Bohs), Dave O'Callaghan (UCC), Paddy Butler (Shannon), Conor Murray (Garryowen), Mike Kelliher (Richmond), Luke O'Dea (Shannon).
Ulster Ravens: David McIlwhaine (Queens University); Chris Cochrane (Dungannon), Michael Allen (Belfast Harlequins), Johnny Shiels (Queens University), Tommy Seymour (Ballymena); James McKinney (Queens University), Ian Porter (Queens University); Paddy McAllister (Ballynahinch), Nigel Brady (Dungannon) capt, Declan Fitzpatrick (Dungannon); Andrew Linton (Queens University),
Neil McComb (Belfast Harlequins); Ali Birch (Dungannon), Stephen Dougall (Malone), Scott Lavella (Trinity College). Replacements:
Niall Annett (Belfast Harlequins), Paul Karayiannis (Queens University), Neville Magee (Dungannon), Stuart McKenzie (Dungannon), Michael Pyper (Queens University), Luke Marshall (Ballymena), Craig Gilroy (Dungannon).