Wilwood 140-18151-R Forged Narrow Superlite 4R Rear Disc/Drum Big Brake Kit – Big Ford New Style, 12.88" Rotor, 2.50" Offset, 6-Lug, Red Caliper

The Wilwood 140-18151-R is a Forged Narrow Superlite 4R (FNSL4R) Rear Disc/Drum Big Brake Kit engineered for Big Ford New Style rear axles. Featuring a 12.88" vented two-piece rotor, 2.50" axle offset, and 6-lug bolt pattern, this kit delivers a complete big brake upgrade for custom, show, and high-performance street machines that require a functional rear parking brake.

At the heart of this kit are Wilwood's FNSL4R four-piston forged narrow calipers finished in red powder coat, paired with high-performance BP-10 compound brake pads. The result is optimized, balanced braking force that complements front big brake upgrades and dramatically improves stopping performance over factory drum brakes.

A key feature of this kit is the internal drum-style parking brake assembly, neatly hidden within the rotor hat for a clean, uncluttered installation. This integrated design provides superior static holding power without compromising the appearance of the brake system.

Key Features:

• Caliper: FNSL4R Forged Narrow Superlite 4-piston caliper – Red powder coat finish
• Rotor: 12.88" (12.875") diameter x 1.10" wide vented two-piece iron rotor
• Axle Offset: 2.50" – Big Ford New Style ends
• Bolt Pattern: 6-lug configuration
• Brake Pads: High-performance BP-10 compound for street and performance applications
• Parking Brake: Internal drum-style shoe system with superior static holding power
• Disc/drum hybrid design retains full parking brake functionality
• Optional rotor designs (drilled, slotted) available for additional personalization

The Wilwood 140-18151-R is the ideal rear brake upgrade for builders looking to match a front big brake kit with a high-performance rear solution that still meets street-legal parking brake requirements. Wilwood big brake kits are engineered for straightforward installation using common hand tools.