Ok I love my setup right now and not much rasp. Sounds really good but friend suggested to remove my test pipes as it is bad to have them on for a long time and bad for health reasons as all its pushing out is the dirty stuff. Can anyone confirm me on this? If so I am going to definately swap my stillen test pipes out for the high flow cats. He suggested me BERK High flow cats are the best bang for the buck.

 

Fast Intentions makes a quality product too

 

Kenitix got bang for buck... Berk's are the nicest though, only one's that have the support braccet.

 

Thanks for the input guys. I also read they are 49 state carb legal and this is for the Berk HFC metallics. Pricey but will be better off than the stillen test pipes. I don't have much rasp because I also have the magnaflow X pipe in my setup. I'm pretty sure my setup will sound much deeper/quieter with high flow cats than test pipes.