Would 2000 Subaru Impreza parts fit 2000 Impreza Outback Sport?

the Impreza L, LS, LX should fit your Impreza Outback Sport. You will need to look at the specific VIN #. It should start with JF1 GD4 or JF1 XXX

As long as the cars have the same XXX, your engine should be fit. That year, Impreza RS 2.5 will not fit your regular 2.2 Engine compartment.

Also, CA car has different intake due to their specific change. For other state, the compartment should be same on the 2.2 engine.

2000 Impreza Outback Sport

Many parts will fit but should be more specific on the displacement because some are 2.0 and some 2.5 liters, try checking engine model, sorry cant help you better whit this little info

Yes they are identical under the body. Well I guess the outback might have slightly higher springs and shocks but they are also interchangeable too.