It appears that these counties in Pennsylvania do not requrire an Emissions test but might require an inspection to make sure there are no modifications.
I doubt anyone would notice eliminated secondaries
........Adams, Armstrong, Bedford, Bradford, Butler, Cameron, Carbon, Clarion, Clearfield,
Clinton, Columbia, Crawford, Elk, Fayette, Forest, Franklin, Fulton, Greene,
Huntingdon, Indiana, Jefferson, Juniata, Lawrence, McKean, Mifflin, Monroe, Montour,
Northumberland, Perry, Pike, Potter, Schuylkill, Snyder, Somerset, Sullivan,
Susquehanna, Tioga, Union, Venango, Warren, Wayne and Wyoming counties.