Marais opted for Chris Massyn to replace the injured Roelof Smit and in a straight swop with the Vodacom Bulls gained Hanro Liebenberg in place of Arno Botha, who was called into Vodacom Super Rugby action.
The undefeated Blue Bulls face another side that is unbeaten and according to Marais, even greater intensity is going to be needed.
"We are playing well, but will have to improve in all areas if we want to beat the Golden Lions on their home turf. That said, I believe we are a competitive team and will give good account of ourselves."