Wilwood 140-16937-R Forged Narrow Superlite 4R Front Disc Brake Kit – Red Calipers

The Wilwood 140-16937-R is a Forged Narrow Superlite 4R Front Brake Kit engineered to bring classic Porsche 911 stopping performance on par with the legendary 1974 RS and 930 Turbo. Built using lightweight forged aluminum components and modern USA manufacturing techniques, this big brake kit delivers motorsports-proven performance in a direct bolt-on package.

At the heart of the kit is the Superlite four-piston radial mount caliper — the same competition-tested design refined over countless laps across multiple racing classes. Paired with an oversized 12.19" (310mm) diameter rotor featuring 32 cooling vanes, the system generates greater brake torque and dramatically reduces heat fade compared to stock brakes.

Key Features:

• Forged Narrow Superlite 4R Caliper — Four-piston radial mount design with red powder coat finish; forged aluminum construction resists flex while reducing unsprung weight
• 12.19" x 0.80" (310mm) Vented GT Slotted Rotors — Iron alloy construction with 32 cooling vanes for sustained high-heat durability; e-coat protected SRP drilled and slotted option also available
• BP-10 Compound Smart Pads — High fade resistance, positive pedal response, and easy-clean surface properties for street and track use
• Stainless Steel Pistons — Resist corrosion and slow heat transfer to brake fluid
• Direct Bolt-On Fitment — Mounts to factory front struts with 3.00" (76.2mm) spaced mounting tabs with no permanent modifications required
• Minimum Wheel Diameter: 15 inches
• Caliper Mounting Bolt Spacing: 3.0" (76.2mm)
• Spindle Type: Factory disc spindle
• Mount Type: Radial

What's Included:

• Forged Narrow Superlite 4R calipers (red powder coat)
• 12.19" GT slotted vented rotors with forged aluminum mounting hats
• Caliper mounting brackets
• BP-10 Smart Pad brake pads
• Braided stainless steel Flexlines
• All installation hardware

Wilwood's forged aluminum calipers, mounting hats, and brackets outperform OEM components while weighing substantially less — reducing unsprung weight for improved handling response. The complete kit is manufactured in the USA to Wilwood's exacting motorsport standards.