So I’m looking at my rear brake rotor and it has a decent sized groove in it...it probably won’t pass inspection. I started looking for replacement rotors and checking prices...which lead to plain, slotted or vented to decide on....each being more expensive.....I search for the differences between them and whether they had any advantage over each other....
That said I came upon this article..... appearently some rotor/brake pad upgrades aren’t helping in some ways..so you can read it and decide for yourself...
Why Cross-Drilled/Slotted Rotors and Big Brake Kits are More Ineffectual than You Think