The Wilwood TX4R rear brake kit for 1999–2018 Chevrolet Silverado and GMC Sierra combines a 16 x 1.25" drilled-and-slotted rotor with a four-piston Wilwood caliper. Specified as a direct-fit rear kit for those model years, it offers enhanced heat dissipation and improved pad contact consistency through the drilled-and-slotted rotor design without changing basic vehicle fitment.
Wilwood 99-18 Chevy Silverado/GMC Sierra 16x1.25 Drilled & Slotted Rotor TX4R 4 Piston Rear Brake Ki