Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
This anodized DynaPro is the side-inlet, small-bore option for a nominal 0.38-inch rotor width. It uses four 1.38-inch stainless pistons in a forged body, with the center bridge bolt included on the SI configuration. The side hydraulic connection should be selected deliberately to match the intended brake-line route. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company makes disc brake systems and components for motorsport, street-performance and specialized uses, including calipers, brake rotors, master cylinders, valves, fittings and brake lines; each component must match the requirements of the complete brake system.
Technical Details
- Manufacturer part number: 120-9705-SI
- Caliper type: Dynapro Lug Mount
- Construction: Forged Aluminium
- Finish: Type III Anodize
- Piston bores: 1.38 / 1.38 inches
- Piston type: Stainless
- Piston count: 4
- Published piston area: 3.00 square inches
- Dust boots: No
- Nominal rotor width: 0.38 inch
- Rotor thickness limits: 0.25–0.38 inches
- Rotor diameter limits: 10.00–13.06 inches
- Mounting style: Lug
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 5.25 inches
- Mounting-hole size: 0.39 inch
- Mount height: 2.10 inch
- Hydraulic inlet thread: 1/8-27 NPT
- Required pad shape: 7812
- Published pad area: 6.36 square inches
- Published pad volume: 2.1 cubic inches
- Manufacturer-listed component weight: 3.8 lb
Fitment & Compatibility
Check the full caliper outline and side fitting against the bracket and surrounding suspension. The 0.25–0.38-inch rotor thickness limits, pad sweep and lateral offset must all match. Verify 5.25-inch lug spacing and appropriate bleed orientation, and compare the piston area with the original brake package before installation.
PMB Performance has over 20 years of experience helping customers with brake and parts fitment. Share the installed component identification and relevant measurements when requesting assistance.
