[m5james]

Originally Posted by Crazy1323

I was under the impression that we can't get much more power out of our cars after tune and Downpipes because the fuel system becomes the limiting factor and no one makes upgraded components.

Has anyone tried the exhaust manifold from the S63Tu?

Granted our block isn't nearly as similar as most may have thought compared to the S63TU, but catless downpipes and tune aren't the limit. PP Performance took a page from Dinan's playbook and swapped parts from other cars onto other engines, claimed it as their own while grossly overcharging. Yes, we can install M5 turbos and headers for get roughly another 100hp or so, pushing us into the 750hp range.

http://www.xbimmers.com/forums/showt...ht=DINAN+PAGES
http://www.xbimmers.com/forums/showt...ht=header+swap

As best as I know, there's a handful of S63TU engines that have been blown from pushing high HP (likely tuning issues), but I don't know of any S63 from being pushed to a breaking point yet. This is by no means concrete, but this is my guess of which order mods will/have been done by most:

1) Carbon filter delete and/or drop in filters
2) Stage 1 tune
3) Stage 2 tune
4) Catless downpipes (tune needed to turn off CEL light)
5) Muffler (be it deletion, purchasing something manufactured or custom)
6) Pure Stage 1 turbos (bolts to stock S63 headers)
7) M5 headers and turbos (mind you M5 guys are swapping to Pure Stage 1 (pushing past 1000hp) and now Stage 2 is in testing)

I only know of 2 custom intakes for the X5M, Solo and myself:

http://www.xbimmers.com/forums/showt...=intake+feeler

Since we can't use the Burger Motorsports JB4 or BCM to control meth, wastegate control, etc. it seems meth is a step that is still unexplored territory as far as I know as well...I'm looking into it for it's cleaning abilities first and foremost, then whatever added octane may be gained for safety reasons, but once again I haven't seen anyone running meth on the S63 yet.

http://www.xbimmers.com/forums/showt...php?p=20141649

Poing being...only a handful of S63's are running M5 headers/turbos and/or Pure Stage 1 turbos, so it seems the limits haven't been found because the S63 hasn't been pushed as much as the S63TU. The million dollar question is if anyones bought these wheels.