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      03-15-2013, 12:23 PM   #7
richb811
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Drives: 2020 G20 330i M Sport
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Quote:
Originally Posted by double trouble View Post
Are there significant performance differences between catted versus catless? Do both require tune to get rid of the CEL?

Ben
The differences aren't significant, but it is a difference for sure. Most notably the catless is going to give you faster turbo spooling, throttle response and more sound.

The catless definitely require a Tune to remove the CEL. The catted varies. We've had some customers not get a CEL, and some who did. You should be using a tune even with catted however.
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