Quote:
Originally Posted by MannyM5
Has anyone cut open the rear most resonator to see if it actually has an X crossover inside. Can anyone that has removed the rear resonator post pics of the inlet our outlets holes showing the inside? I am hearing mixed answers on if it is an X inside or not. If it is an X, the most cost effective mod to me seems to be to just straight pipe the secondary cats and forward resonator, while leaving the rear "X" resonator in place. Thanks
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It's more of a resonance chamber.
Both pipes do merge there and exhaust has the option of flowing out of either side once it enters that final chamber.
Maybe it's not technically considered an x pipe but it is in fact the spot where bmw merges the exhaust pulses.