Berk HFC vs Test Pipes
 

Does anybody know the power increases of Berk HFCs & Berk test pipes. Im planning on replacing my cats and wondering which way I should go. Suggestions?

On an NA 370Z, there will be no noticeable difference in power between HFC's and test pipes. Test pipes will be louder, rasp more, and possibly leave some carbon residue on your rear bumper cover. But of course test pipes will be cheaper, always a plus.

There is going a difference in hp of about 5hp give or take advantage with test pipes but you also lose torque which is why I think good HFCs are the best balance of HP and torque gains. Motordyne Art pipes reportedly combine the best of both but with test pipe levels of flow but you still will deal with exhaust fumes and a bit of a wait time.