What’s the most overrated ‘performance’ mod people waste money on?" (Chrome intake pipes? Stick-on vents?)

What performance mods are actually a waste of money?

I’ve seen a lot of folks at the shop drop serious cash on parts that promise big gains but don’t really deliver. It got me wondering what’s the one mod you think people overspend on for minimal real-world benefit? I’m talking about things like those shiny chrome intake pipes that mostly just look good, or stick-on hood vents that do nothing for cooling. Are there other common ones that come to mind? I’d love to hear what you’ve seen or tried that didn’t live up to the hype.