2023 BMW M340i Muffler Delete Cold Start and Revs

2023 BMW M340i SOLD at Performance Luxury Sport in Marysville, OH.
Let me know if you are interested in this vehicle or any other we have. Here is a full list of our inventory!
www.performanceluxurysport.co...
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[@matthewretrosi7111]

did this delete the factory valve system?

[@drew2z674]

Kept the valves?

[@Car-guy307]

Sounds like a diesel ?