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<blockquote data-quote="B33mEr" data-source="post: 409512" data-attributes="member: 13609"><p>Here's an info on headers and the CEL error lights: </p><p></p><p><a href="http://forum.e46fanatics.com/showthread.php?t=571990&highlight=headers" target="_blank">http://forum.e46fanatics.com/showthread.php?t=571990&highlight=headers</a></p><p></p><p>Here's a pic of E39 with M54B25 exhaust manifolds with catalytic converters built into them:</p><p><img src="http://www.realoem.com/bmw/diagrams/e/h/24.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p><a href="http://www.realoem.com/bmw/showparts.do?model=DT42&mospid=47541&btnr=11_2183&hg=11&fg=50" target="_blank">http://www.realoem.com/bmw/showparts.do?model=DT42&mospid=47541&btnr=11_2183&hg=11&fg=50</a></p><p></p><p>The aftermarket headers will not have a catalytic converters hence the 02 sensors will detect it hence the CEL error.</p><p></p><p>As what bro ramsing mentioned if you have abudget of 2-3k then a software remap would be more sensible as you can do more mods to your rear exhaust box (put a straight thru pipe) RM400, K&N air filter panel RM360 plus a software remap ~RM2k. All within your budget.</p><p></p><p>How much did the shop quoted you for the headers and installation work?</p></blockquote><p></p>
[QUOTE="B33mEr, post: 409512, member: 13609"] Here's an info on headers and the CEL error lights: [url]http://forum.e46fanatics.com/showthread.php?t=571990&highlight=headers[/url] Here's a pic of E39 with M54B25 exhaust manifolds with catalytic converters built into them: [img]http://www.realoem.com/bmw/diagrams/e/h/24.png[/img] [url]http://www.realoem.com/bmw/showparts.do?model=DT42&mospid=47541&btnr=11_2183&hg=11&fg=50[/url] The aftermarket headers will not have a catalytic converters hence the 02 sensors will detect it hence the CEL error. As what bro ramsing mentioned if you have abudget of 2-3k then a software remap would be more sensible as you can do more mods to your rear exhaust box (put a straight thru pipe) RM400, K&N air filter panel RM360 plus a software remap ~RM2k. All within your budget. How much did the shop quoted you for the headers and installation work? [/QUOTE]
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