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Message: <blockquote data-quote="KL2DC" data-source="post: 175718" data-attributes="member: 3452">A warm welcome to you!! Congrats on your new car delivery! Well the E90 is still relatively new as such there isn't a healthy catalogue of engine mods available out there especially for gasoline engines. From what I know, there are various intakes (results/improvements not verified/validated), cat-back exhaust solutions and they are still working on various ECU flash/chips products. That's all I've read about on engine mods. I am doing the K&N drop-in filter thing, hopefully this weekend. Our filters are different, we use the flat-panel assembly here in the US while you guys have the cylindrical filter arrangement. (DIY: <a href="http://www.e90post.com/forums/showthread.php?t=4101" target="_blank">http://www.e90post.com/forums/showthread.php?t=4101</a>)The jury's still out on how much power/difference is attained with this mod, folks have reported a louder (more pleasant) intake sound and some have noted slightly improved response and fuel economy. We'll see. As far as I know, the K&N filter will not void warranty but if you're concerned you can always swap filters prior to bringing the car in for service. The filter swap will not register an error code. Good call on TiAg is a great low-maintenance color. Can't say much about your wheels (type 154) right? I have puny 16" 156's myself *sigh*. All the other high rollers here are riding on 17" 161s and 159s <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" /></blockquote>

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