The DynaPro Single (DPS) billet caliper is the newest generation of calipers available as an upgrade or replacement for applications previously using the Dynalite Single (DLS) series. The 120-9688 runs two stainless pistons with a 1.38-inch bore and 1.50 square inches of total piston area, is built for a 0.38-inch rotor up to 13 inches in diameter, and ships with a Type III anodized finish. Its billet aluminum body weighs 2.3 pounds per the manufacturer.
The case for paying more than a basic single-piston caliper rests on its bridge and pad design. The manufacturer fits every DPS with replaceable stainless SRS bridge plates, which it says eliminate the bridge wear caused by pad gouging to extend the service life of the caliper body. Those plates also dampen pad rattle and the vibration that feeds squeal. Pads sit in a 6812-type friction profile with 3 square inches of pad area, so a track buyer can source common compounds without re-engineering the setup.
This is a universal lug-mount caliper, so fitment depends on your spindle, hub and rotor rather than a listed vehicle application. Confirm the 3.25-inch mount center and 1.92-inch mount height before ordering. Do not confuse it with the 120-9688-LP, which the manufacturer lists with a thinner 0.19-inch rotor width. Track-day builders searching for a 3.25 lug mount Wilwood single-piston caliper for a 13-inch rotor will find this the baseline DPS configuration.
The manufacturer lists the standard 120-9688 with a 0.38-inch rotor width, while the -LP suffix version is built for a 0.19-inch rotor. Match the suffix to your rotor before ordering.
No. The manufacturer's specification sheet lists no dust boot for this part.
The manufacturer's Dynapro instructions recommend Hi-Temp 570 grade fluid or EXP 600 Plus, with EXP 600 Plus for severe braking or sustained high heat. Its guidance also states that silicone DOT 5 fluid is not recommended for racing or performance driving.
Installation is an intermediate job for a home mechanic with experience on brake hardware. Plan on a torque wrench, red threadlocker, a set of thin shims for alignment, and a fluid bleeder. Per the manufacturer's Dynapro instructions, the mounting bracket should sit squarely against the spindle, and the rotor must be centered in the caliper window, adjusted with equal shims on each bolt. Pad height should be set so the pad top sits flush with the rotor's outer diameter. On some spindles, factory ears can interfere with the bracket, and the manufacturer says they may need to be removed. Bleed the system starting with the caliper farthest from the master cylinder, outboard screw first, and use the four corner bleed screws to purge air. Because the inlet is 1/8-27 NPT, expect to use a proper adapter and steel-braided line rather than the factory hose fitting.
