Depends what you want, stock or performance. Like said earlier get 5th gen and cut down intermed pipe if you have a v8, bolt on for v6.
If you want performance magnaflow is nice. I have it on one of my v8s and it sounds good., no problems for 3 years. Have the gibson elite on my other v8. Sounds better but not as well engineered. Does not fit as nice and I had to have it welded to keep its position. Plus the gibson tip is angled not straight so it looks like a blind person installed it.
If you can find a TRD or Borla good luck. They are like hens teeth.i have a TRD made for a v6 but trimmed for the v8. It sounds exactly like the manaflow.