There 4 diiferent kinds of pipes:
1. Alum off road (no cats)
2. Alum off road (with cats)
3. Steel off road (no cats)
4. Steel off road (with cats)
The first one is the cheapest and the 4th one is the most expensive. I think it goes for over $200 bucks. I went with the alum no cats with a borla cat-back system. There is very little drone in my car. Depending on where you live and how ong you plan on having your car is also a decision on wich pipe to get. Here in MI, I will probably get 3-4 years before the pipe starts rusting. I should have gone with the steel, since the borla is stainless steel. Maybe next year I will upgrade to the steel.
