On the Driverside theres the steering rack, the passenger it’s the ps pump and alternator. The RH side sticks out further to give room for the lower radiator hose and alternator removal(inevitably will die based on how close the header is)

The reason it’s so tight to the alternator is that both downpipe will merge and exit out that side in a 3" pipe. The LH side wont work for the downpipe due to the steering linkage.