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Message: [QUOTE="6.7Bison, post: 1561779, member: 32432"] I have two and a half semi-educated guesses. To bring down exhaust heat, to bring down an engine bay hot spot, or a bit of both. Stainless manifolds and cooled turbine housing may allow for higher sustained EGTs while still meeting OEM reliability standards of the exhaust system. I don't know if any of the emissions equipment has a "too hot" temperature range that could be a limiting factor on the current 6.7L powerstrokes. May at least help with some of the common warped manifolds and broken rear studs. By cooling the hot turbine housing sitting in the valley of the engine it may cool the ambient components such as the upper intake manifold and the compressor housing giving a slight gain in efficiencies. This one makes less sense to me personally as the complexities look to outweigh the benefits, but I don't always agree with OEM solutions. [/QUOTE]

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