Questionsa about cats

[IronMan]

Okay, I got the pacesetter ceramic coated headers.

Now, I am going to a 3 inch I-pipe.

I need everyone's opinion on High flow cats.

Here are my questions.

1. How much louder would my exhaust be if I ran without the cat and had 3 inch pipe from headers to muffler? (A percentage would be nice!!)

2. What part number for an O2 simulator that works for our cars?

3. What would you do, high flow or no cat? (There are no smog tests in Indiana, so please delete that factor.)

[MrCoffee]

run the cat, it helps the sound and adds some back pressure. Plus it saves the trees man cmon now

[IronMan]

True it does save the trees, but I only drive my car about 4,000 miles a year.