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About a week ago I noticed a buzzing noise from my exhaust when I accelerate. It seems to be getting worse. Do I have an exhaust leak? I have a '95 LS - all stock.
the stock header has 2 pipes at the collector (a-pipe): the outside pipe, and then an inside pipe - both separated by a weld. this weld will break and the internal pipe will then rest on the outside pipe and vibrate.
I had the same problem before and found the muffler shop I went to used the wrong type of bolts that connect my catalytic converter to my exhaust piping. I would try here first cause its pretty simple fix. hope that works for you.
Thanks for all the replies. Upon more closely listening, the sound seems to be coming from underneath the drivers seat and perhaps the engine bay. I'm also noticing a decrease in power.
