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The BMW Range
3 Series
Removed Cat and Resonator lose power?
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<blockquote data-quote="k3nny" data-source="post: 1544" data-attributes="member: 139"><p>hey guys.. just looking for an opinion... i recently took out the whole exhaust system from the headers on.. it was a 2inch pipe and now its a 2 and 1/4inch pipe.Also theres no cat now and just 1 hi-flow resonator. Im thinking of removing the resonator and just running the pipes straight. Will i be losing power? I thought maybe not as the pipe diameter only increased from 2inch to 2 and 1/4 inch. I know that even if there was a gain, or a loss to be had, it will be minimal but nevertheless, im just wondering. Thanks! PS: Bearing in mind that i also have a cold air intake now, not sure that it would make a diff or not.. <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" /></p></blockquote><p></p>
[QUOTE="k3nny, post: 1544, member: 139"] hey guys.. just looking for an opinion... i recently took out the whole exhaust system from the headers on.. it was a 2inch pipe and now its a 2 and 1/4inch pipe.Also theres no cat now and just 1 hi-flow resonator. Im thinking of removing the resonator and just running the pipes straight. Will i be losing power? I thought maybe not as the pipe diameter only increased from 2inch to 2 and 1/4 inch. I know that even if there was a gain, or a loss to be had, it will be minimal but nevertheless, im just wondering. Thanks! PS: Bearing in mind that i also have a cold air intake now, not sure that it would make a diff or not.. :D [/QUOTE]
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