Ok I have not decided what to go with yet. My current setup is Stilllen gen 3 CAI, Magnaflow cat back in transit to be delivered next week and COBB AP. First thing is do i really need a HFC. Second thing what will be best for keeping a deep tone and good hp gains. Any help would be appreciated, I have already searched the forums but couldnt find anything with my setup.

 

You don't NEED it, you can run the stock cats with your Magnaflow. Of course, you CAN run the HFC with your Magnaflow for increased performance, but it's not a must.

HFCs are known to give pretty good gain for our cars.
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they seem to all use the same type of "magnaflow high flo spun metalic 300 cell converter" and their all just about 2.5 other than the new revision BERK is said to be 2.75. so go with the best deal you can find and or company you trust more. they will all perform equaly.

 

absolutely right! tahts what i did and i came out with berks....

 

PM Andy(HPAuto) on the boards here. He may be able to get you an inside deal.