The thing to remember when suspecting an exhaust leak is that exhaust leak noise is load-dependent.
If it's loud when you're heavy on the gas, and a lot quieter or non-existent when you're just coasting along at 2k or 3k RPM, then an exhaust leak seems likely.
If it doesn't follow that pattern, then I would suspect something else.
FWIW, the gaskets that came with my BBK headers were crap. They both started leaking pretty quick. Got some different ones that looked a bit thicker and they've been good.
Also, my header bolts like to work themselves loose a lot. It's good to check on 'em periodically. Loctite helps too.
If it's loud when you're heavy on the gas, and a lot quieter or non-existent when you're just coasting along at 2k or 3k RPM, then an exhaust leak seems likely.
If it doesn't follow that pattern, then I would suspect something else.
FWIW, the gaskets that came with my BBK headers were crap. They both started leaking pretty quick. Got some different ones that looked a bit thicker and they've been good.
Also, my header bolts like to work themselves loose a lot. It's good to check on 'em periodically. Loctite helps too.
