Wrexham are two games from Wembley in the FA Trophy after Wales Under-21 star Marc Williams inspired them to a dramatic comeback at Workington.
Wrexham went behind in the third round clash when keeper Gavin Ward's poor throw was stolen by Gareth Arnison who set up Jonny Wright to score.
Sub Williams made an instant impact as he was fouled in the area and Nathan Fairhurst scored the resultant penalty.
Striker Williams hit two late goals to secure Wrexham a quarter-final place.
Wrexham manager Dean Saunders said: "It is job done, it was a difficult game.
"We were made to sweat and the goal we conceded was another suicide mistake by us.
"We have got to eliminate those errors if we want to achieve anything.
"But the number of times we have gone behind and won is amazing, we've got a winning mentality at this club now and expect to win - even when we went behind I expected us to win.
"We've got players that are not just fit but determined to win."
Workington: Collin, Langford, Rowntree, May, Andrews, McLuckie, Vipond, Jonny Wright, Hopper, Anthony Wright, Arnison. Subs Not Used: Hardman, Robinson, Anane, Lloyd.
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