Munster, playing into a strong wind opened their account with an O'Gara penalty in the 3rd minute. He added to that with a second four minutes later before his opposite number Luciano Arquera kicked his side's first score in the 12 minute.
Arquera should have levelled in the 18th minute missing a penalty from the 22 and O'Gara landed a third penalty in the 38th minute, kicking into an ever strengthening wind.
Munster: J Murphy; D Howlett, W Chambers, D Barnes, K Earls; R O'Gara, C Murray; W du Preez, D Varley, BJ Botha; D Ryan, P O'Connell (capt); D Leamy, P OMahony, J Coughlan. Replacements; D Fogarty, M Horan, J Hayes, D O'Callaghan, N Ronan, T O'Leary, S Deasy, L Mafi.
Aironi Rugby: R Trevisan; S Sinoti, A Masi, G Pavan, G Venditti; L Orquera, T Keats; M Aguero, F Ongaro, F Staibano; M Bortolami (capt), N Cattina; S Favaro, J Furno, J Sole. Replacements: R Santamaria, S Perugini, L Redolfini, Q Geldenhuys, F Ferrarini, T Tebaldi, N Olivier, G Toniolatti.
Referee : P Allan (SRU).