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ST Subframe modifications


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Permitted exceptions to 6.2.1 states:


1h) Reinforcement of suspension mounting locations on OEM frame rails,Sub-frames/suspension cross-members, and unibody is permitted provided there is no performance benefit or relocation of the mounting points.

Does this mean that I am able to permanently weld a washer on a factory location tab eliminating the adjustment slot and still comply with the rules?

See photo of slot below.


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  • National Staff
Greg G.

That would seem to make sense--reinforcing with the washer, and still using the factory mounting location, just without the adjustment slot...

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  • 1 month later...

Along the same lines, what about reinforcing or adding a differential or engine mount on a subframe? 

Edited by CRallo
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