Pros: Quality, price, service
Comments: This is the best exhaust kit you can get for your WJ. Best parts available, from flowmaster and magnaflow, the tubing is perfect and fits just good in my WJ.
You will have a converter, muffler and tailpipe, all 3 inches.
Competition cat back kits are 2,5', and more expensive, without converter.
I didn't use the tip (yet), I like the sleeper look better than this shiny tip, anyway, I may change my mind someday, so I keep it.
The sound is great, not too noisy for highway and street use, but really nice when you rev up.
Performances seem a bit better, in a matter of acceleration more than horsepower, but I actually didn't check this seriously, so I'll leave it to the ones who did measurements to say what it gives.
Nick from Kolak is helpfull, quick and efficient, great service, worldwide (I'm European)
Anyway, I'm very happy with my exhaust