Name That Noise
If it wasn't the heat shields or a broken hanger, I'd probably say it's the cats. Does your exhaust smell richer than you're used to smelling? (Don't put your face up to the pipes now...) My cats are shot right now, and apart from the terrible noise, Gas mileage went down too... I gotta start working again...
Like I said, don't stick your face down there. Like Darren said, on start-up, there is a noticeable difference in smells.



