WELSH League Division 2 minnows Cwmbran Celtic dumped Division 1 high-flyers Goytre out of the Welsh Cup to set-up a quarter-final meeting with Port Talbot Town.
Celtic established a three-goal lead through Owen Cook, a Calum Miles own goal and a Lee Challenger penalty just before the break.
But Gwent rivals Goytre hit back twice before a superb volley from Chris Ham virtually settled the tie.
Ham added another before the visitors snatched a late consolation.
Cardiff Met University will host Gap Connah's Quay after winning 2-0 away to Afan Lido, both goals coming from the prolific Adam Roscrow.