Can anyone tell me if an exhaust setup with cat bypass pipes would be dangerous in any way? combustion hazard??

 

I have a 2005 Gallardo coupe, fully stock.

 

In no way dangerous, done all the time.

 

I have one in Pompano Beach that you can hear if you'd like. Its one of our shop cars.

 

Removing cats will DECREASE the exhaust gas temperature. The catalytic reaction to convert some of the gases into harmless ones is what heats the cat converters up to 800 degrees Celsius. The stories of the exotics catching fire are due to problems with the cats. If you bypass the cats entirely, you're effectively reducing the temperature of your engine and exhaust system by at least a few hundred degrees.