Take the heat sheild off the cat, and the one above the cat. You'll see 2 bolts on the bottom of the car, toward the back. Take those off. Now look at the shifter, and take the one off the shifter itself, and the 2 that hold the shifter to the support rod. It's much easier to get to these, if you remove 2 bolts on the same side of the cat( left of right, not front or back), and loosen the other 2. This gets the cat of out the way.
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Eric Waterman
1996 200SX SE-R
1997 200SX SE-R
1991 Sentra SE-R