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The BMW Range
3 Series
E90, E91, E92, E93
Noise from undercarriage
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<blockquote data-quote="Herbert" data-source="post: 738506" data-attributes="member: 18029"><p>This subject has been discussed way back in 2009 and check out the following advice from one of our experienced members...</p><p></p><p></p><p><a href="http://www.bmwclubmalaysia.com/forums/forum/the-bmw-range/-3-series/e46/27316-catalytic-converter-removed/page2" target="_blank">http://www.bmwclubmalaysia.com/forums/forum/the-bmw-range/-3-series/e46/27316-catalytic-converter-removed/page2</a></p><p></p><p>10-11-2009, 07:32 PM</p><p></p><p>Do not remove your catalytic converter....your car will go nuts!</p><p></p><p>Google: closed loop EFI systems for further clarification</p><p></p><p>All bmw xhaust systems have been designed, engineered and bench-tested to give your engine the best balance of power, torque and economy.</p><p></p><p>Aftermarket xhaust only work if you have done internal modifications(pistons, cams, etc) to your engine. Standard engines will receive NO benefits especially if you are running on automatic transmission. You will experience loss of power and increase in fuel consumption.</p></blockquote><p></p>
[QUOTE="Herbert, post: 738506, member: 18029"] This subject has been discussed way back in 2009 and check out the following advice from one of our experienced members... [URL="http://www.bmwclubmalaysia.com/forums/forum/the-bmw-range/-3-series/e46/27316-catalytic-converter-removed/page2"]http://www.bmwclubmalaysia.com/forums/forum/the-bmw-range/-3-series/e46/27316-catalytic-converter-removed/page2[/URL] 10-11-2009, 07:32 PM Do not remove your catalytic converter....your car will go nuts! Google: closed loop EFI systems for further clarification All bmw xhaust systems have been designed, engineered and bench-tested to give your engine the best balance of power, torque and economy. Aftermarket xhaust only work if you have done internal modifications(pistons, cams, etc) to your engine. Standard engines will receive NO benefits especially if you are running on automatic transmission. You will experience loss of power and increase in fuel consumption. [/QUOTE]
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Noise from undercarriage
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