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Message: <blockquote data-quote="Tom328" data-source="post: 698976" data-attributes="member: 16210">M54B25 and M54B30 bore is the same 84mm so there is no need to bore out the block. Difference is only the stroke M54B25 75.0mm compared to M54B30 89.6mm. So you can actually just take the internals from a B30 and plonk it into your B25. Please verify this.There are other differences between the B25 and B30 apart from the displacement so a stroker kit into your B25 won't give you the same power, unless you put in a 3.2 <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool    :cool:" loading="lazy" data-shortname=":cool:" /> Do check this website out <a href="http://www.e46fanatics.com/faq/m54engine.html" target="_blank">http://www.e46fanatics.com/faq/m54engine.html</a>- - - Updated - - -M54B25 and M54B30 bore is the same 84mm so there is no need to bore out the block. Difference is only the stroke M54B25 75.0mm compared to M54B30 89.6mm. So you can actually just take the internals from a B30 and plonk it into your B25. Please verify this.There are other differences between the B25 and B30 apart from the displacement so a stroker kit into your B25 won't give you the same power, unless you put in a 3.2 <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool    :cool:" loading="lazy" data-shortname=":cool:" /> Do check this website out http://www.e46fanatics.com/faq/m54engine.html</blockquote>

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