Anyone know if mufflers are part of an emissions warranty? Wife's 2013 Chevy Equinox didn't come with much info. After only 5 years and 58,000 miles the seam on her muffler has split open and it's sounding like a riced-out Civic. Thankfully it's after the cat, it's not throwing any check engine lights, and it doesn't look like it would be too many $$$ to replace.