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      12-16-2021, 04:57 PM   #61
spicoli024
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Drives: 2021 M3 COMPETITION
Join Date: Mar 2009
Location: Houston, TX

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Thanks for the video, and being offering your car as the Guinea pig for this system. Sounds great, lots of growl without the rasp--just what I'm looking for. Few quick questions:

1. In what mode were you running while on the test drive (sport plus with valves open the whole time)?

2. Does the installation of these downpipes affect the operation of any of the OEM engine or valve settings? In other words, can it still run in efficient mode with the valves closed so the kid can sleep in the back?

3. At 9:10 in the video, you hear the first gurgling crescendo of the backfire. Does this happen all the time when you back off the throttle at high RPMs?
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2021 ///M3 Competition
2018 BMW M3 Competition | 2009 BMW E60 M5 | 2008 Audi B7 RS4 | 2006 BMW E46 M3 ZCP | 2003 BMW M3 CP
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