Running Rich after installing new fuel injectors

Hey people, I have a 2015 si sedan and have been running rich after replacing the fuel injectors to brand new ones. Before this I was running really lean, my short term fuel trims was at 41.4, so I decided to replace the injectors and they’re now at -31.3. I have Skunk2 CAI, Catless Skunk2 dp, and mega power rr exhaust. The car has 75k miles. Any advice would be much appreciated into fixing this issue. Mahaloz.