The two South African franchises clash at 14:30 at Ellis Park Stadium, with both teams chasing crucial log points as the competition enters its decisive phase.
Redelinghuys expects a fierce contest up front, warning that the Stormers, coming off successive defeats to the Sharks, will arrive in Johannesburg determined to reassert themselves in the set pieces and physical exchanges.
"They are a quality team so we are expecting a massive battle from them, a strong set piece battle and a strong set-piece battle."
The Lions head into the derby buoyed by their recent victory over the Sharks, a result that strengthened their push for a place in the top eight of the URC standings.
Playing at altitude has often proven to be an advantage, and they will be eager to use home-ground momentum to consolidate their position.
Redelinghuys says there is a clear understanding within the squad that accuracy will be non-negotiable, particularly against the Stormers.
"We have been preparing well this week so far, but we have to pitch up on the day and have the guys ready to perform well this weekend. It's another game at home, which is always great."
While pleased with the win over the Sharks, the Lions coaching staff have identified areas that require improvement, especially in the scrums and mauls.
"There were certain things we were happy with, like scoring a maul try. Scrum wise, we conceded too many penalties on our own ball which obviously turns over possession, and although it didn't cost us massively against the Sharks, it is something we have to work hard on to get right against the Stormers."
With the URC schedule resuming at full pace following the Six Nations, the race for playoff places is intensifying and every fixture carries added importance.
South African teams have built their reputations on forward dominance and physicality, and this encounter is expected to reflect that identity.
Redelinghuys says derby matches offer the perfect benchmark, providing his forwards an opportunity to measure themselves against one of the competition’s most formidable packs in a contest that could have significant implications for the standings.