Wilwood Dynapro 4R Rear Disc Brake Kit - 12.19' Rotors, 66-75 Bronco, Sm Bearing SKU: 140-13320N

Wilwood Dynapro 4R Rear Disc Brake Kit | 66–75 Bronco, Small Bearing

Upgrade your Bronco’s stopping power with the Wilwood Dynapro 4R Rear Disc Brake Kit, engineered for 1966–75 Ford Broncos with small bearing rear axles. This performance kit is a direct-fit solution for Broncos originally equipped with 10" drum brakes and rated with 2700 or 2900 GVW. Featuring forged billet 4-piston Dynapro calipers, 12.19" vented lug-mount drum/rotors, and high-friction pads, this kit delivers modern braking force to match front big brake upgrades. The internal shoe-style parking brake ensures superior static holding power with a clean installation.

• Fits 1966–75 Small Bearing Broncos: Designed for stock axles with OE 10" drum brakes and 2700/2900 GVW ratings.

• Forged Billet Dynapro Calipers: 4-piston performance calipers offer powerful and consistent braking force.

• 12.19" Vented Lug-Mount Rotors: One-piece rotors enhance heat dissipation and improve brake balance.

• Internal Parking Brake System: Hidden shoe-style parking brake provides clean looks and excellent holding power.

• Small Ford Flange Fitment: Compatible with 2.36" axle offset and small bearing (2 7/8" OD bearing).

• Personalizable Options: Choose from optional caliper finishes and rotor styles to match your build’s look.

• Requires 15" Wheels or Larger: Check clearance diagram to confirm fit with your wheels.

• Brake Lines Sold Separately: Kit does not include flex lines—must be purchased to complete install.

Boost rear braking with Wilwood’s 4R kit for 66–75 Broncos—4-piston calipers, 12.19" rotors, and an internal parking brake. Small bearing fit. Big stopping power.