Wilwood 140-17003-Y Forged Narrow Dynapro-P Radial Rear Disc Brake Kit - Yellow Caliper

The Wilwood 140-17003-Y is a Forged Narrow Dynapro-P Radial Rear Disc Brake Kit engineered for high-performance street and race use. Designed for 1983–1989 Porsche 911 applications equipped with 3.50" caliper mounts, this complete bolt-on kit delivers motorsport-grade stopping power without requiring additional brackets or adapters.

At the heart of the kit are Wilwood's Forged Narrow Dynapro-P (NDPR-P) 4-piston calipers, finished in a distinctive Le Mans Yellow powder coat. The forged aluminum construction minimizes weight while resisting flex and heat under demanding conditions. Stainless steel pistons further reduce heat transfer and provide long-term corrosion resistance.

Key Features:

• Forged 4-piston NDPR-P calipers in yellow powder coat finish for high-tech styling and structural rigidity
• 11.42" x 0.95" vented rotors — available in plain face or SRP drilled and slotted one-piece design made from proprietary alloys
• BP-10 compound Smart Pads deliver positive response, long wear life, high fade resistance, and easy clean properties
• Stainless steel braided flexlines included for consistent pedal feel and long-term durability
• Direct-bolt installation — mounts directly to the rear strut with 3.50" spaced mounting tabs; no additional brackets or adapters required
• Minimum 15" wheel diameter required for proper clearance
• Complete kit includes calipers, rotors, pads, brackets, flexlines, and all necessary hardware

The Wilwood 140-17003-Y is the ideal upgrade for Porsche 911 owners seeking a complete, race-proven rear disc brake system that retains OE hubs while dramatically improving braking performance on the street or track.