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<blockquote data-quote="garauld" data-source="post: 1463572" data-attributes="member: 371"><p>AFAIK, there has only been one subframe failure reported by a rider (passx) while using a stiffy kit: <a href="https://www.fjrowners.com/threads/subframe-failure.145647/post-1195851" target="_blank">Passx note</a></p><p></p><p>Aluminum does not have a fatigue limit so the cast subframe will eventually fail given enough stress cycles. I believe stiffy kits can substantially prolong the life of the stock subframe. For the money, I think they were cheap insurance but I grew tired of making them (I'm now retired) so I hope Murph or someone will pick up where I left off.</p></blockquote><p></p>
[QUOTE="garauld, post: 1463572, member: 371"] AFAIK, there has only been one subframe failure reported by a rider (passx) while using a stiffy kit: [URL='https://www.fjrowners.com/threads/subframe-failure.145647/post-1195851']Passx note[/URL] Aluminum does not have a fatigue limit so the cast subframe will eventually fail given enough stress cycles. I believe stiffy kits can substantially prolong the life of the stock subframe. For the money, I think they were cheap insurance but I grew tired of making them (I'm now retired) so I hope Murph or someone will pick up where I left off. [/QUOTE]
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