I bought a ranger a month ago that needs an exhaust tip end to pass inspection because the dude before me cut it off because he like the sound. But i just went and got the whole thing that hang and screws on halfway from a scrapyard off a another ranger that looked in decent just had a head on collision but are there any precautions that i should do before running my truck with this new exhaust and muffler

 

No, as long as the engine in the donor was the same or larger than your engine it will work fine