3" mandrel bent stainless steel exhaust is suggested. Yo Dude Performance made my exhaust setup their site is
www.yodudeperformance.comas for running an air/air intercooler it would be much less efficient and you would have to have the piping bent and get into custom brackets to mount the intercooler as well as modification to the bumper and bumper support itself.
With the air/water you can ice your resevoir so the intercooler has ice cold air flowing through it. I am beta testing a NX cooler kit that will purge C02 onto the heat exchanger in the front bumper. I will post results once my car is finished ~ 9/15 from the new widebody, brakes, paint, and audio install.
