Quote:
Originally Posted by JimmyZ06
Are you saying the stock down pipes are restrictive then? I don't know DICK about these cars yet but I want a more pronounced exhaust note with the option to go from Mild-to-Wild with the push of a button. i.e. at BiModal setup if they exist.
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This is my opinion from personal experience. If you have plans for catless downpipes in the near future, stick with your stock exhaust and invest your $$$ in the catless downpipes and see how you like it. The stock downpipes are restrictive for airflow & sound. Once you replace them with catless downpipes, your increasing airflow and noise. You may love your OEM system then. I've heard that setup before and it sounds really good. If you then decide you want something louder you can go with a different system that fits what you want. You can youtube EVOLVE Downpipes F10 M5 and see the video. Sounds amazing with the OEM system.
If you go the opposite, you run into the risk when you upgrade your downpipes, you may not like how loud your car is or how much drone there may be.
Just my two cents.. I know a few people who have said they wish they started downpipes first.
Note: Changing downpipes will trigger a CEL due to the O2s being deleted. Most are resolved with the JB4 while others like me went with a tune
If you do downpipes, you can pick this up to control your exhaust valve
http://www.exhaustmeister.com/