Wilwood 140-16947-DY Forged Narrow Superlite 4R Front Big Brake Kit – Drilled & Slotted Rotors, Yellow Calipers

The Wilwood 140-16947-DY is a motorsports-proven front big brake kit engineered to bring 1969–1989 Porsche 911 braking performance up to the standard of the legendary 1974 RS and 930 Turbo. Built with lightweight forged aluminum components and manufactured in the USA, this kit delivers a dramatic improvement in stopping power and thermal stamina over the factory system.

At the heart of the kit is Wilwood's Forged Narrow Superlite 4-Piston Radial Mount Caliper, a design that has proven itself across countless laps in multiple competition classes. The caliper is finished in a high-visibility yellow powder coat for a bold, race-inspired look. Paired with it is an oversize 12.19" (310mm) GT-slotted or SRP drilled and slotted e-coat rotor, providing superior heat dissipation and consistent bite under repeated heavy braking.

Brake feel is refined by Wilwood's BP-10 compound Smart Pads, which deliver positive pedal response, excellent fade resistance, and easy-clean properties. The entire kit — including forged aluminum calipers, mounting hats, and bracket — is engineered to outperform stock cast iron components while significantly reducing unsprung weight.

Key Features:

• Forged Narrow Superlite 4-piston radial mount calipers in yellow powder coat finish
• 12.19" (310mm) diameter GT slotted or SRP drilled and slotted e-coat rotors
• BP-10 Smart Pad compound for fade resistance and positive response
• Forged aluminum caliper, mounting hats, and bracket — lighter and stiffer than OEM
• Direct bolt-on to front struts with 3.50" (88.9mm) spaced caliper mounting tabs — no modification required
• Braided stainless steel flexlines included
• Manufactured in the USA

This complete front brake kit is designed for a direct, hassle-free installation using common hand tools. Everything needed for a full front brake upgrade is included in the box, making it an ideal choice for street-driven classics and weekend track cars alike.