Recently, the exhaust pipe separated from my muffler right at the inlet. Originally, I was going to weld it back, but the pipe is too corroded to weld. I also noticed that with the factory muffler effectively bypassed, both acceleration and fuel mileage are noticeably better. I also don't hate the sound (when the loose exhaust components aren't banging into each other). I do need to do something, as fumes do come into the cabin (windows down at all times now). My plan is to replace the exhaust tubing from behind the transmission back, delete the factory resonator, and install a flow through style muffler instead to keep the characteristics as much as possible of a broken exhaust system without driving the neighbors crazy and attracting the attention of every police vehicle in earshot. Magnaflow and Dynomax both make flow through style mufflers that are about the same price. Has anyone used either the Dynomax Ultra Flow or a Magnaflow Oval? I want some sound deadening, but I could stand to be a little louder than stock. Engine is a naturally aspirated 2.5L horizontally opposed 4 cylinder with unequal length headers that are known for a rumbly sound.