Quote:
Originally Posted by hunternight5
I will also be getting a 2021 m550i next month and wanted to know if I can install this dp without a tune bmw just did an oil change on my x5m and my service adviser freaked when he found out my car was tuned he said If we had to do work on the engine the warrenty would have been voided he told me not to do a tune on my next car so that's why I wanna know if I can install a catless dp without a tune mainly for just sound don't care about hp gains because i read somewhere that the car will run lean or rich something like that without tuning
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Hi,
You can install the downpipe without a tune, it will throw a check engine light but its only a warning. the car runs exactly the same.