yes for the passenger side i used the jeep grand cherokee exhaust manifold exit hole it 2 1/8. its cause the muffler guy i go to said, he cant make the driver side 2.25 he would have to start at 1 3/4inch then to 2inch then to 2.25 like the rest of my exhaust system . and i said yeahhhhhhhhhh ill do some research lol ill be back