I also have a 95 4cyl. I found 2 restrictors. Take off the top part of your air box. The 1st is in the front of the airbox itself (looks like a small horn). Takes a little prying with a screw driver, but not too bad. The 2nd one is located on the top part of the airbox (where the hose that connects to the throttle body). This one looks like a small horn also, but is much tougher to remove (mine took about 10 min of some serious prying-----there are 2 prongs, break them off and then get a small screw driver between this restrictor and the airbox (there's a rubber band type of gasket that makes removing this restrictor hard). Remove those 2 tabs, get pull that gasket out, and the restrictor then removes easily. I bent up the end of my air outlet, but it straightens out fairly easily and the hose fits fine. The back rest. alone is about 4 cm at it's smallest diameter, but with this rest. removed, the new opening is about 7 cm. Well worth the effort.
95 yj, 4 cyl, auto trans, 4:88 gears, detroit front locker, rear detroit with super 35 kit, short shaft conversion, 4" superlift, 32" superswamper radials