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Originally Posted by catback
Where do you get your information cuse that's all wrong, the high rpms of the turbo itself generates heat as does the added backpressure. A free-flowing exhaust is cooler because heat doesn't build up it dissipates with a turbo in place the exhaust doesn't flow as freely as stock and heat doesn't dissipate as fast with the turbo in the way.
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I have to disagree with this. First, the turbo does not generate much excess heat due to most turbos having water and/or oil jackets to cool them, and second, the gas is heated when it exits the turbo due to the friction created by the air being compressed, but then it is usually cooled by an intercooler before it enters the intake. It is possible that because of the air/fuel mix that Willravel refers to is being increased due to the turbo compressing the air the exhaust might be a little hotter, but I think that the overall effect of a turbo on exhaust heat is negligible.
edit: I appreciate the info, Will, but am curious as to what prompted this explosion of information.