Bower will get his first start in the competition in familiar territory, playing his Mitre 10 Cup football with Otago.
He joins a forward pack full of experience, with the Crusaders welcoming back the likes of Sam Whitelock, Matt Todd and Codie Taylor back into the starting side. Their returns are among a number of changes to the Crusaders team that decimated the Chiefs last weekend.
David Havili returns to the starting side in the No15 jersey after spending time in the reserves, with Will Jordan moving back to the bench, while Bryn Hall returns to halfback in place of Ereatara Enari.
The Highlanders have made changes of their own ahead of the southern derby, with Teihorangi Walden returning in the midfield in place of Thomas Umaga-Jensen, who will miss the game due to concussion. Jack Whetton come into the starting side at lock in place of Pari Pari Parkinson, who will also miss the game due to concussion.
Liam Squire and Rob Thompson remain unavailable due to a hip and ankle injury respectively.
Crusaders: David Havili, Braydon Ennor, Jack Goodhue, Ryan Crotty, George Bridge, Richie Mo'unga, Bryn Hall, Whetukamokamo Douglas, Matt Todd, Jordan Taufua, Samuel Whitelock, Scott Barrett, Owen Franks, Codie Taylor, George Bower. Reserves: Andrew Makalio, Harry Allan, Michael Alaalatoa, Quinten Strange, Tom Sanders, Ereatara Enari, Brett Cameron, Will Jordan.
Highlanders: Ben Smith, Waisake Naholo, Sio Tomkinson, Teihorangi Walden, Richard Buckman, Josh Ioane, Aaron Smith, Luke Whitelock, James Lentjes, Shannon Frizell, Jack Whetton, Josh Dickson, Tyrel Lomax, Liam Coltman, Ayden Johnstone. Reserves: Ash Dixon, Daniel Lienert-Brown, Siate Tokolahi, Tom Franklin, Elliot Dixon, Dillon Hunt, Folau Fakatava, Marty Banks