AP Racing Radi-CAL Competition Rear Kit 365mm - Porsche 911 997, 991

The AP Racing by Essex Radi-CAL Competition Brake Kit is a rear brake system for a wide range of Porsche 911 models, from the 996 GT3 through the 997 and 991 Carrera, Targa, GTS and Turbo families. It uses AP Racing CP9449 Radi-CAL four-piston calipers and 365 x 30mm, 72-vane J Hook discs, keeps the factory parking brake, and is centerlock compatible, with the disc sandwiched between the hub and drive pins.

Why upgrade

The rear brakes on a 911 carry a big share of the braking load because of the rear engine layout. This kit uses a larger 365mm floating disc yet still saves weight: approximately 8 to 9 pounds per car versus the 997.2 GT3 iron brakes and roughly 4 pounds versus the 997 S and GTS and the 991.2 Base and T. Each caliper weighs 4.85 pounds against 5.7 to 7.0 for the factory units. Pistons are sized for the OEM master cylinder and ABS.

Caliper and disc construction

The CP9449 is a radial-mount Radi-CAL caliper with an asymmetric, hard anodized body, stainless pistons, anti-knockback springs and low-drag seals. Pads are available from all major manufacturers in a commonly used shape. The CP5775 discs ride on 6061 hard anodized aluminum hats with fully floating hardware.

Features

• AP Racing CP9449 Radi-CAL four-piston rear calipers
• 365 x 30mm, 72-vane J Hook discs on floating hats
• Retains the OEM parking brake
• Centerlock compatible
• Pairs with AP Racing 911 front kits

What's Included

• One pair AP Racing CP9449 Radi-CAL Pro5000R racing calipers
• One pair 365x30mm AP Racing 72 vane, J Hook racing discs, with fully floating 6061 hard anodized aluminum hats and attachment hardware
• One pair caliper mounting brackets and hardware
• One pair Spiegler Stainless Steel Brake Lines with abrasion resistant coating
• Detailed installation instructions

Brake pads are not included.

Specifications

Video

Fitment notes

Fits the 911 models below and keeps the factory parking brake. Centerlock compatible. Call us about the 997 GT3, 991 Turbo and GT2 models. Check your wheel with the wheel fitment template before ordering.

Fitment