Eben Etzebeth and Frans Malberhe have been included in the Stormers' run-on side for Saturday's match against the Bulls in Pretoria.
Etzebeth replaces Chris van Zyl at No 4 lock, while Malherbe takes over from Wilco Louw at tighthead prop.
In the third swap, flank Rynhardt Elstadt is back from his one-week suspension, with Juarno Augustus dropping out of the match 23.
Meanwhile, centre Juan de Jongh and No 8 Sikhumbuzo Notshe will make their return from injury via the bench.
Stormers – 15 Dillyn Leyds, 14 Cheslin Kolbe, 13 EW Viljoen, 12 Damian de Allende, 11 Seabelo Senatla, 10 Damian Willemse, 9 Jano Vermaak, 8 Nizaam Carr, 7 Rynhardt Elstadt, 6 Siya Kolisi (c), 5 Pieter-Steph du Toit, 4 Eben Etzebeth , 3 Frans Malherbe, 2 Bongi Mbonambi, 1 JC Janse van Rensburg.
Subs: 16 Ramone Samuels, 17 Steven Kitshoff, 18 Wilco Louw, 19 Chris van Zyl, 20 Sikhumbuzo Notshe, 21 Justin Phillips, 22 Juan de Jongh, 23 Dan Kriel.
Photo: Shaun Roy/Gallo Images