I just got an 04 hemi and these thing is QUIET compared to my 00GT w/ magnapacks. Would getting a dual setup take away low-end Hp or would it make a difference if I got duals or just single outlet. I'm still deciding between flowmasters and magnaflow. Which is the best to get and who sells them the cheapest.

 

leave the factory setup... on the 04's there are alreday 2 cats, so the only thing you gain with duals is looks. If you put duals on it, you do loose on the low end... I would recommend waiting for the K&N cold air intake for the 04 or a prgrammer... that is where you will get a good boost of HP.