Quote:
Originally Posted by DanMpower
That would have been sweet but I think the key to that high pitch “F1” sound is a forward placement double x, not at that rear.
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What’s next, a tri or quad X design?
Yes, a single forward x-pipe design sounds great and usually outperforms a mid or aft X location by a significant amount. Dual X + dual resonators takes up most of the x-pipe mid section. It sounds ok. The best? Not sure. Curious to see the impact a multi X has on whp & torque as well as to see whether it causes a low rpm torque dip. Ideally, it requires dyno time to maximize engine tunes with this design - will this be limited to only a few tunes available for the e9x M3? Lastly, there’s the concern about quality and durability of this x-pipe. For example, the Turner Ti muffler fails badly when used on the track. You definitely don’t want an x-pipe littered with cracks! Personally, I’m not a fan of Ti with forced coloring as opposed to one that naturally colors itself with heat cycles like an full Akra Ti exhaust.