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Old 05-25-2011, 06:21 AM
knox6er knox6er is offline
2005 645CI Vert.
Location: knoxville, TN
Join Date: Apr 2011
Posts: 66
Mein Auto: 645CI
I thought it was posted in the other thread that deleting the third resonator and replacing it with an Xpipe lets the engine breath better.
Deleting the Catbacks, although sounds better, does nothing to unrestrict the engine, apparently it will still bottleneck where the Xpipe should go.

I am thinking to just delete the third resonator, install the Xpipe first and see how that sounds then go from there.
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