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Bumping this thread. I've got pictures of the machine work required to get the S63 turbos to fit onto these S63TU headers. RBoosted ran these and noted a loss of power, but it also should be noted that it was a canned tuned for the most part.
I've written PP Performance to ask how they handled crossing over the exhaust pulses and what affect it'll have on getting proper readings for AFR, fuel trims, etc but I'm not holding my breath on them replying. I've written my tuner, Halim/HC Performance, because of my concern on how tuning and adjusting for AFR's would be done since S63 headers are confined to one side of the engine vs S63TU headers crossover the banks. At this point I might be going doing what S63TU guys do in that they don't need to use JB4 for tuning and meth control anymore (I'll likely keep it on there for logging and map 4 safety features), instead it's more refined tuning and I might be using my Aquamist meth setup after all. TBD.
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