Wilwood 140-17656-DR D31 Rear Disc Brake Kit with SRP Drilled Rotors Red Calipers

The Wilwood 140-17656-DR is a complete D31 rear disc brake kit engineered as a direct-fit upgrade for Porsche 911 models equipped with factory "M" 3.00" OEM rear calipers. This kit delivers a significant improvement in strength, braking efficiency, and unsprung weight reduction over the stock braking system.

At the heart of this kit are Wilwood's forged aluminum D31 direct-mount calipers, each weighing just 4.1 lbs. The calipers feature machined stainless steel pistons and are designed with the same 3.00" mounting centers, height, and offset as the traditional Porsche 911 "M" calipers — allowing for a straightforward, bolt-on installation without modification to the factory mounting points. This kit includes the calipers finished in a Red powder coat.

Key Features:

• Forged aluminum D31 dual-piston calipers — lightweight 4.1 lb. body with machined stainless steel pistons
• SRP directional drilled and slotted rotors — 11.42" diameter with black e-coat finish for corrosion resistance
• 0.95" rotor thickness — OEM replacement sizing for 1984–1989 Porsche 911 applications
• 3.00" mounting centers — same height and offset as factory 911 "M" calipers for direct fitment
• BP-10 compound brake pads — standard D31 pads included, compatible with Wilwood and FMSI D31 pad interchanges
• DOT-compliant stainless braided flex brake hoses included
• Red powder coat finish — also available in Black; Yellow powder coat, Type III hard anodize, and special colors available as special orders

The SRP (Street/Race Performance) rotors in this kit feature a directional drilled and slotted surface pattern that promotes consistent pad bite, improved heat dissipation, and reduced brake fade under performance driving conditions. The entire kit is engineered to work with the factory master cylinder, making this an ideal upgrade for street performance and track-day use.