[F87source]

Originally Posted by E90convert

Just for fun, I googled “hydrogen embrittlement NHTSA recall.” Here is a good one. There are many. 12.9 is certainly possible and useful when done right. But the “off the shelf” spec still offers HE risk.

https://static.nhtsa.gov/odi/rcl/201...9V039-4268.PDF

https://static.nhtsa.gov/odi/rcl/201...5V347-4420.pdf

I'm not saying HE isn't a possibility, I'm saying it's possible to have good quality after market, grade 12.9 fasteners that don't fail.

Btw you don't have to be an OEM with "centuries" of experience to make good products, you can have after market companies make parts that are even better than oem, and just because a product is made by an OEM doesn't guarantee quality. For instance verus engineering makes way better aero parts than even Porsche's factory OEM parts, why? Because they don't have any restrictions stopping them from doing so.

Then look at bmw, look how good their OEM charge pipes are.