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Old Jul 16, 2018 | 05:30 AM
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Default A close one....

Hello Guys,
last night my spring leaf broke, and i discovered that the reason are my cutouts..
Even the cutouts were not pointing directly to the spring leaf, the hot exhaust gas has softened the resin of the composite spring leaf, causing it to broke in two..
i have been extremely lucky, it has happened on highway at 90 mph.. i took the very first exit, that for my luck was really near.. everything went fine



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Old Jul 16, 2018 | 06:24 AM
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Lesson learned by you, and you live to see another day. Maybe this will help someone else.
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Old Jul 16, 2018 | 07:19 AM
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Originally Posted by AORoads
Lesson learned by you, and you live to see another day. Maybe this will help someone else.

Thanks for sharing that.
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Old Jul 16, 2018 | 08:42 AM
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I ran cutouts on my C5 for several thousand miles with no issues. The were in a similar location as yours but I pointed the turndowns so they had minimal effect on the spring. Ultimately, I pulled the composite springs and shocks off and replaced them with a set of coilovers. If you insist on keeping your cutouts (and I would understand why) you may want to consider coilovers. I'm currently running a Corsa X and MagnaFlow Competition catback on my C7 so absolutely no need for cutouts.



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Old Jul 16, 2018 | 08:44 AM
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^^^ Amazing clean cutout job sir

Last edited by Steve Garrett; Jul 16, 2018 at 08:11 PM.
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Old Jul 16, 2018 | 11:14 AM
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Yikes. Glad this didn't turn into a 90mph crash.
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Old Jul 16, 2018 | 11:14 AM
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Originally Posted by s n v f f
Even the cutouts were not pointing directly to the spring leaf, the hot exhaust gas has softened the resin of the composite spring leaf, causing it to broke in two..

Wow! I never would have considered the leaf springs on any exhaust work. It makes sense ... now. Sorry for your mishap. Great learning event, thanks!
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Old Jul 16, 2018 | 11:53 AM
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Very very lucky as you know that could have been a real catastrophe. Thanks for sharing.
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Old Jul 16, 2018 | 12:25 PM
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Originally Posted by dvilin
Very very lucky as you know that could have been a real catastrophe. Thanks for sharing.
Thank you all guys, i think a Forum it's important for share nice experiences, but also bade mistakes that we can learn from.
thanks you all for the support
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Old Jul 16, 2018 | 12:56 PM
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Dang thats bad!

At least its time for a new exhaust. haha!!

-Josh
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Old Jul 16, 2018 | 02:14 PM
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Certainly good information for others who have cut-outs. Glad that you safely made it off the highway.
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Old Jul 16, 2018 | 02:38 PM
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Scary business. Glad you and your car survived.

Thanks for sharing the story.
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Old Jul 16, 2018 | 03:46 PM
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Originally Posted by Black 03 Z06
Scary business. Glad you and your car survived.

Thanks for sharing the story.
Ditto.

This is why I don't do substantive modifications. Essentially they mean that you become your own development engineer, with a lot fewer resources than the manufacturer devotes to testing and verification.

Glad it worked out well.
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Old Jul 16, 2018 | 08:12 PM
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Glad everything turned out OK and that you're alright.
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Old Jul 16, 2018 | 08:18 PM
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Yikes! I would have never given it second thought that cutouts would melt the leaf spring!

So glad it ended safely for you.

Last edited by Maxie2U; Jul 16, 2018 at 08:35 PM.
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