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Old 07-31-2013, 10:48 PM   #6
wallyworld
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Join Date: Feb 2013
Location: Wisconsin
Posts: 223
My Ride: 2003 325i 4dr sedan
Re: best tune for catless headers for m54b30

Quote:
Originally Posted by jdjg View Post
yes....
BMW Euro map... no more Check Engine light, no mor O2 sensor after cat, no more cat....., also you will gain around 5hp vs BMW US map....


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is there a easy way to do this diy? or is there a better tune out there for less?

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