Bought the "cheapest" - straight pipes with beautiful tips. Sound great - pretty easy installation. 1 problem: The Insulator mount (keeping vibrations from the body) has 2 bolts connected with a rubber/neoprene cushioning connector that could not handle the stress/torque from actual track time. I was "black flagged" because my one connector broke out and my tail pipe was dragging. I did a home repair - hockey puck and "all-thread" rods kept it all together.
pretty good system over all
The fit is pretty good, although looking from the rear, I could not get the pipes perfectly symmetrical, no matter how hard I tried. Just a slightly different angle from one side to the other. Pretty nitpicky, but that's how I am. Other than that, the system's installation was pretty simple and straight forward. Over 700 dollars I felt was a little expensive, but I guess that' what it is these days. If it lasts as long as the stock system do, I wont complain, but if it rots out in 3 years.....