Whats a good universal muffler for my 04 AV6 coupe? Ive been looking around and there are lots of options, now im overwhelmed. Anybody have any luck with some more than others? Id like it to soundlike theInfiniti G35 coupes...can you help? oh and Im gonna do a 2.5" custom cat-back. I want to increase HP and low-end torque if possible....maybe deleting the mid-cat as well..Im not sure if all that will be too much flow and loss of backpressure. Im clueless

 

2.5"? Damn...that's gonna boom.

Apexi, magnaflow, flowmaster, skunk2, etc.