This Detroit Axle S-55133x2 is a manufacturer kit containing two rear drilled and slotted brake rotors for Silverado, Suburban, and Sierra 1500 trucks. The performance drilled and slotted rotor style is designed to improve heat dissipation and braking performance compared to solid rotors, and you're receiving a complete pair for the rear axle.

You must always replace brake rotors in pairs on the same axle for even braking performance and safety. This kit includes two rear rotors (left and right) so you have everything needed to replace both rear rotors at once, which ensures balanced braking force and prevents uneven wear or pulling to one side during stops.

Drilled and slotted rotors like these Detroit Axle rear rotors combine holes and grooves to improve heat dissipation, vent gases and brake dust, and maintain better pad contact during braking. They're particularly beneficial for trucks that tow, haul heavy loads, or encounter repeated hard braking, as they help reduce brake fade and improve wet-weather performance compared to standard smooth rotors.

Yes, proper bedding is critical to performance and rotor life. After installing these rotors with new brake pads, perform five moderate to aggressive stops from 40 mph down to 10 mph in rapid succession without coming to a complete stop, then allow the brakes to cool by driving without heavy braking for several minutes. This deposits an even layer of friction material onto the rotor surface and prevents warping or uneven pad wear.

Replacing brake rotors is a straightforward job for DIYers with basic mechanical skills and tools—you'll need a jack, jack stands, lug wrench, socket set, and typically a C-clamp or brake caliper tool to compress the pistons. If you've changed brake pads before, rotor replacement adds only a few steps; if you're uncomfortable working on brakes or lack the tools, a shop can handle the installation quickly and ensure proper torque specs and bedding.