Does anyone know a good way to find exhaust leaks? I think I might have one...since there seems to be almost as much noise coming from the downpipe area as there is from the mufflers...

Unless that's normal on a modded exhaust?

 

Wherever the exhaust would meet with another section, like a flange that gets bolted to another one, put your hand around it. If you feel hot air coming out... there's your leak.

It's not that hard.

 

Put it on a lift and put a box or something to cover the mufflers, then feel where the connections to see where the air is escaping from.