2.5 diameter Random cats or Magnaflow Cats.

I have the Magnaflows, because PPE had them as an option when buying theyre headers. Work great.

You can buy the Magnaflow cats from Paul @ PPE (http://www.ppeengineering.com/)

It will quiet it down and not lose power.

Which exhaust are you using?

~Dv8

 

Thanks a lot)) and when i will install it there will be no drone at 1.5-2.5 r/min? i'm using Joe Z exhaust

 

you meant this cats ?
http://www.ppeengineering-onlinestor...&categoryId=35

 

The headers with no cats show a 38-46whp gain

The headers with high-flow cats show a 28-33whp gain

http://www.ppeengineering-onlinestor...&categoryId=35

You told me that with cats i will not loose any hp

 

What about trying to fit the OEM mufflers to replace the ones provided with the JoeZ exhaust? I'm sure the noise will come down, and I guess some HPs will get lost in the process.