Hi, I have a 1997 pontiac Trans am with a lt-1 v-8 engine. I just got done installing pacescetter longtube headers, 3 inch cutout and corsa catback exhaust system. I have no leaks that i can hear and it sounds pretty damn good but i have been noticing that when i fire it up i have a lot of condesation in the exhaust.
I understand that water is a by product of combustion but i think it is going little over board, im not sure if its from the cold winters in Wisconsin or somthing else. But it puddles at the bottom of my cutout and comes out the exhaust if i back up and go forward. Everytime i start my car in the winter I leave it run till it gets up to operating temperature. And last night i took it around and drove it for about a half hour and i might do that agian tonight to let it warm up and stay warm for awhile.

My question is is this normal for winter or just normal with a high flow exahust system?

 

It's pretty much normal.
Keep a close check on your water level in your bottle and see if it's using any.
Down here with the humidity ya get a lot of condensation out the pipes.

 

I've been getting a little more condensation out of my tailpipes now then I was during the Summer, but nothing I am worried about.

 

There are basically only two combustion products (in addition to the nitrogen that just "passes through")... a huge amount of CO2 and a huge amount of H2O. What you are describing sounds completely normal.