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      06-27-2016, 05:24 PM   #3
Adem1534
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Drives: '16 M2
Join Date: Aug 2013
Location: Alex from the United States

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Will running the car with a catless downpipe without a tune be dangerous for the engine? The elimination of back pressure doesn't mess everything up?

I'm scared now to run a downpipe without a tune adjusting for the difference in pressure etc it makes.