Mafi joins Denis Hurley in bringing a wealth of experience to a young but talented backline that includes Scott Deasy, Ivan Dineen, Simon Zebo and Sean Scanlon who were all involved in last Sunday's 19-7 win over Leinster.
Tipperary man Dave Foley once again captains the side and he will be counting on all local support to welcome Munster to Nenagh on Friday.
Admission is €5 (adult) and €2 (U16) at the gate.
Munster: Sean Scanlon, Denis Hurley, Ivan Dineen, Lifeimi Mafi, Simon Zebo, Scott Deasy, Conor Murray, Dave Ryan, Sean Henry, Stephen Archer, Dave Foley capt, Ian Nagle, Dave O'Callaghan, Brian O'Hara, James Coughlan. Replacements: Ger Burke, Dave Kilcoyne, Darragh Hurley, Kieran Essex, Paddy Butler, Duncan Williams, Eric Maloney, Ronan O'Mahony.
Ulster Ravens: A D'Arcy, T Seymour, N Spence, J Shiels, M McCrea, J McKinney, M Heaney, M Cromie, J Burns, A Macklin, C Napier, N McComb, TJ Anderson, A Birch, T Patton Replacements: N Annett, A Whitten, R Hackney, P Pritchard, J Bloomfield, M Allen, C Cochrane, C Gaston.