AP Racing Road Rear Brake Kit 380mm - Porsche 997, 991

The AP Racing by Essex Road Brake Kit is a rear brake upgrade for the Porsche 997 and 991 911. It pairs AP Racing CP9541 World Radi-CAL II four-piston calipers with 380 x 28mm, 48-vane AP Racing J Hook discs on fully floating aluminum hats, built for fast road driving and track days.

Why upgrade

Weighs roughly the same as an OEM rear 991 or 997 rear brake setup despite a huge size increase (330mm versus 380mm). The caliper takes a 16.9mm thick pad for long life and heat tolerance. Painted calipers with dust boots add durability in wet and dirty conditions. Low noise, vibration and harshness give an OE-like feel in daily driving. Pistons are sized to maintain brake bias and work with the OEM master cylinder and ABS.

Caliper and disc construction

On the Porsche 997, 991, the CP9541 caliper mounts radially on a dedicated bracket at 195mm centers with a 36mm offset, with an M10x1.0 inlet thread. Large volume brake pads add heat absorption and longevity.

Features

• AP Racing CP9541 four-piston calipers
• 380 x 28mm, 48-vane J Hook discs on floating hats
• 16.9mm thick brake pads
• Pistons sized for the OEM master cylinder and ABS
• Two-piece discs on 6061 aluminum hats

What's Included

• One pair AP Racing CP9541 World Radi-CAL II four piston calipers
• One pair 380x28mm AP Racing CP5914, 48 vane, J Hook 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
• One set of Ferodo DS2500 Brake Pads
• Detailed installation instructions

Specifications

Video

Fitment notes

This rear kit fits the vehicles in the table below, which we confirmed against two sources using US model years. Essex has confirmed clearance with OEM rear 20 inch 991 Carrera T wheels. Call us about the Porsche 911 Carrera, Porsche 911 Carrera 4, Porsche 911 Carrera 4S, Porsche 911 Carrera GTS, Porsche 911 Carrera S and Porsche 911 Carrera T before ordering; we have not confirmed fitment for them yet. Check your wheel with the Essex wheel fitment template before ordering.

Fitment