Dawie Theron has made five changes to his team for their final group match against England in Pandova on Saturday.
After both teams achieved bonus-point victories over Scotland and Ireland over the last fortnight, this clash will be the Group C decider.
The Baby Boks have fielded two different-looking teams for their encounters, and Theron has now selected his strongest match 22 for the England fixture.
Lions fullback Jaco Taute starts after coming into the squad as a late replacement for the injured Craig Barry. Scrumhalf Pieter Rademan is rotated with Lohan Jacobs.
Amongst the forwards, Siya Kolisi is promoted ahead of Cornell du Preez while hooker Bongi Mbonambi and loosehead prop Juan Schoeman return to the front row.
The Baby Boks have faced England in all three U20 tournaments, losing twice in the semi-finals before beating them last year in the 3rd/4th place play-off.
Baby Boks - 15 Jaco Taute, 14 Courtnall Skosan, 13 Bradley Moolman, 12 Francois Venter, 11 Wandile Mjekevu, 10 Johan Goosen, 9 Pieter Rademan, 8 Arno Botha (c), 7 Siya Kolisi, 6 Nizaam Carr, 5 Eben Etzebeth, 4 Ruan Venter, 3 John Roy Jenkinson, 2 Bongi Mbonambi, 1 Juan Schoeman.
Reserves: Michael van Vuuren, Nick Schonert, Jean Cook, Cornell du Preez, Lohan Jacobs, John Welthagen, Paul Jordaan.