... I just added the Kinitex Plenum and cats and it woke the exhaust up a little. The plenum by itself changed the tone but did not make it any louder. The cats however did add some volume. I didn't want loud, but the stock Nismo exhaust is a little quiet. Others have said the RT cats made it loud so I was a bit nervous. Those who put the Kinitex on said the sound changed slightly, but was not obnoxious. My exhaust is perfect now, not to quiet, not to loud.

On the performance end, the plenum itself helped high end power, but the convertors seemed to have helped power everywhere.

Thanks Mike

 

NIce review.Need hi flo cats

 

I should add that the convertors seemed to pick aound town drivability. It seems easier to accelerate from a stop to get up to speed. I'm hoping that might also lead to a gas mileage increase. Again I'm very happy with my exhaust now. Aggresive when I want it and quiet when I need it.
Thanks Mike