Yesterday I had a chat with a Mopar buddy of mine who is the parts manager at my old Chrysler dealer in Southern CT. We got to talking about exhaust mods and he harangued me for not having touched the exhaust system on the 300M. My protestations in the name of "It's one system that I haven't had problems with, so I'm scared to touch it" didn't go over well at all.
He told me that from the catalytic converters, both pipes dump into a RESONATOR, which is then carried to the transverse MUFFLER via two pipes, which is then carried to another resonator, which goes to the tailpipe.
I found this diagram of the 2000 LH exhaust, but when I compare it to an image I took of my 300M while it was up on the rack a few days ago... something doesn't look right.
See in the diagram it shows that #6 is a SINGLE pipe coming out of the first resonator to the transverse muffler. But if I look at the bottom of my car correctly, there are definitely TWO pipes and not just one. He had suggested that I remove that first resonator and replace it with an "X-pipe", and then delete the transverse muffler and replace it with a straight pipe. My question is, what's the point in adding an X-pipe? Since my car apparently has dual pipes coming OUT of the first resonator, couldn't you just delete the resonator and put in 2 straight pipes?
EDIT: Nevermind. Just did some research... apparently X-pipes are better for "exhaust scavenging" causing the pulses to feed off each other.
Anyone know what diameter the inlet/outlet ports of an X-pipe would need to be for these cars? Are they the same for both inlet/outlet? I'm curious to know if X-pipes will screw up the backpressure and therefore harm low-end performance (acceleration lag)... At this point, I'm just asking questions and trying to learn... but I think it's strange that the 2000 diagram from Chrysler looks different than what is on my car.
I feel like deleting the first resonator AND the muffler (leaving only the catalytic converters and 1 resonator) might result in catastrophe. That's removal of two major components of the exhaust system, I wonder if the noise would be prohibitive.