I have wrapped my down pipes on my b5 s4 with great luck. Thinking about wrapping from the turbo flange to the top of the X. You would not see it from behind the car, only with the bumper removed. Any thoughts, or experience with this on these cars?

 

I'd suggest sending it to Jet Hot for their Extreme 2000 or 2500 coatings-keeps heat in the exhaust, and maintains a good exterior surface.

Choice of colors, too.