How Long Will Rear and Side Louvers Last?

[Dark Stallion]

Assuming proper install

Specifically the MMD rear louvers and the speed form side louvers for a 2018 Mustang.

I haven’t been able to find any long term reviews or input.

Thanks!

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[Interceptor]

Not educated on those products, but seems that installation is the difference on the side scoops.
Seems some are having problems with tape holding scoops on. Then they fall off.
The parts themselves should last a long time. The rear window louvers will be affected by how much sun beats on them.