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Message: <blockquote data-quote="tony5050" data-source="post: 168164" data-attributes="member: 1765">guys, before looking into the engine running condition i.e. running lean with loads of temperature, perhaps we should look at how the manifolds are fitted..try to use a section of flexible pipe under each manifold exit, this will help the exhaust system to flex especially during our acceleration..engine does move abit when we rev it up..tht's usually causing the crack...my 2 cents though..cheers<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /> ..of course, running lean is also a factor getting the manifold hot and easier to crack...</blockquote>