i would buy it any mod to make your car faster is good i rocked the intake and test pipe only for a long time i even ran a 16.6 i think it is a good buy i never noticed a sound change for only test pipe

 

youre better off getting a headder and leave the other cat there you'll be happier in the long run. And you will get a little louder exhaust either way but not like having a muffler. My test pipe made my Exhaust deeper sounding. I'm getting rid of it and buying a headder though.

 

For the price, its change more than with my headers

 

There is a guy on these forums Bobaab i think is his name, he has the test pipe with stock exhaust, u should PM him and ask him what he thinks about it.

 

so are you guys saying a high flow cat is best if using an rrm header and cat back system for driving and street racing?

 

No not saying that is better for the price !