"Inexpensive performance exhaust" (this is also considered and "off road only" exhaust)
This will work for genII's only to my knowledge and you will need a welder. Purchase a 90 degree mandrel bend, A glasspack (cheap glass pack is what makes this under 50 bucks), A 2.5-2.5 exhaust connector, and a 4 foot length of pipe. Cost just around 50 bucks.
Remove the entire exhaust system including the cat, and muffler, take out the downstream 02 and zip tie it to the frame. spray WD-40 on the hangers to help slide them off. You will need to reuse the hanger under the bed next to the drive shaft. So do not remove that one. If you cut a slit in the pipe connecting to the Y-pipe you should be able to turn it a few times and pull it off.
Cut the 90 degree pipe in the center of the curve so that you have one 45 degree elbow and another 45 degree elbow with a little pipe on the end. Now weld them back together to create and S that will run over top the crossover. Weld your 2.5 exhaust connector to the other side of the s pipe. This will fit over your facotry Y-pipe.
Weld about 1.5 foot section to the S pipe (The side that doesnt have the connector.) After that weld you glass pack. Now take the remaining pipe and weld that too the other end of your glass pack.
Now you are ready to install the new exhaust. Fit the connector over the Y-pipe. And then clamp the pipe after the glass pack to the factory hanger. Then you are done.
This will give some performance increase and will also make your truck sound mean as hell. Any questions?