Quote:
Originally Posted by Sal@Evolve
You must keep the air filter element clean and ensure the Pre CAT 02 sensors are in good health.
Other than that, after tuning literally cars in the thousands now, we have had great success in alphaN running it on E39 M5, E46 M3, E36 M3 and E60 M5.
Post as many questions as you wish on the subject of alphaN and any concerns you may have.
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Does the airbox/alphaN tune create issues with smog(I'm in California)? Assuming visual isn't an issue.