The brakes on the Performance Pack GT's and Dark Horse are pretty amazing. Best factory brakes I've ever used.
Options are pretty slim right now for brake pads, but some good quality pads should help when the time comes.
You could go all-out too and upgrade your front brakes to the Performance...
They're definitely both right-rear springs, both are for 24-25 Mustangs with Magneride and they have different specs. Looks like Ford messed up.
Coil Spring - Right, Rear | FordUS
Coil Spring - Right, Rear | FordUS
Perhaps one is stock and the other is for the Performance Package?
I love my car. Purchasing it was no problem. After the fact, Ford has just sucked. 3 different dealers for a few issues and servicing and they all dropped the ball. I've owned/operated an auto repair shop for 25 years and I'd just rather have my own guys work on it than bother with any warranty...
I'm not looking for these things on a Mustang. All these unnecessary options are just higher costs. If I want these kind of things, I'd go buy some generic looking SUV turbo 4 banger thing with all that crap tacked onto it.
If you get a drain pan with the flat top that drains into the bottom portion, get a oil drain spash mat for it or the oil hits the top of the drain pan and splashes everywhere. Amazon.com: Kidum 4 Pcs 22'' Oil Drain Splash Pad Mat for Transmission Drain Pan No Splatte Squarer Pad for Mechanics...