Remodeling

Hi all! We are remodeling a 3 car garage into living space! We are going to add a pellet stove (all inspected by local code enforcement following the rules)

Question we have is, do we add the pass through pipe kit while we have drywall down and studs exposed, or do we wait until drywall is done and then cut a hole for the pipe?

Wasn’t sure if one way was more beneficial than the other?

To clarify, we are going straight out of the back of the pellet stove straight out of the exterior wall and then up on the outside of the house.

Thanks!