re: <E36> '98 Muffler Mechanism?!?!?!?

[Dean Schindell <schindel@xxxxxxx>]

Michael asks about the flap in the inside exhaust pipe near the end of the
muffler.

This flap has 2 purposes:
1.  to increase low end torque by increasing backpressure below 3000rpm
2.  to reduce noise below 3000rpm.

As you might have guessed, it's closed below 3000rpm and opens above that.

Dean
'96 328is (with the flap)
BMW CCA
BMW CC BC

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