Best Bang-for-the-Buck Horsepower Mods?

Alright, let’s talk mods specifically, which ones actually deliver noticeable power gains without emptying the wallet. I’ve seen folks drop serious cash on upgrades that barely move the needle, so I’m curious: what’s worked for you?

Intake and exhaust seem like obvious starting points, but are they worth it for the gains? And what about tuning anyone had luck with a solid ECU flash or piggyback tune? I’ve heard mixed things about throttle controllers or lighter pulleys, but if they’re cheap and effective, I’m all ears.

Bonus points if you’ve got any under-the-radar tweaks that surprised you. Let’s hear your real-world experiences!