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First road test was inconclusive. I couldn't tell any big sound difference. (It's 24F outside so I wasn't eager to roll down the windows to hear the exhaust)
It seemed the trans shifted faster in Drive mode....felt almost like DS.
UPDATE: from the e46 forums, probably the real reason for the baffle:
"""Nope....keeping one of the exhaust pipes closed increases backpressure, which in turn gives (slightly) greater torque delivery at lower RPMs. (Remember, a 325 needs all the help it can get....it has a dinky little 150 cubic-inch motor pulling 3300 pounds of steel, which ain`t no joke). Wide-open throttle equals low manifold vacuum, which allows that little half-assed flap to open, giving better high-RPM breathing ability."""
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CURRENT:
10 328iT ZMP-6spd, 00 Z3 MCoupe, 76 2002 stg.2 5 speed
PAST: 96 318ti Cali, 03 325Ci, 00 Z3 M Roadster, 99 Z3 2.8 Coupe, 14 X128i M-Sport14 Z4 28i Sport 6-spd
Last edited by elfhearse; 12-26-2013 at 06:27 AM..
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