Well first off, he will not be getting an H-pipe. He will have to get an X-pipe. To my knowledge, the H-pipe just will not fit under the SN-95. Either way, they do the same thing.
Depending on what brand you get, you will aquire a different sound. Also, if he is running hi-flo cats or an off road X-pipe will make a HUGE difference in sound and peformance.
I have both an h-pipe with hi-flo cats and an off road h-pipe. I ran both setups for just about the same time. I love the off road better. It gives a deaper sound and makes it sound down right MEAN
. Because it doesn't have cats, it gives little, tiny backfires but that just add character to it
IMO: You friend should get an BBK or Bassani (sp?) off road X-pipe for his pony. It should cost him about 150 for the off road. If he decides to go with the cats, it will cost between 300-350. I got my headers, both h-pipes, and cat back from Summit. They have a special section (after the wheels/tires) in their mag just for the greatest car ever built. You can check out their selection. Any further questions, just PM me