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AP Racing rear brake kit for the Porsche 997 GT3 with 365mm two-piece discs and calipers

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Angled view of the ENP CP9449 caliper for the Porsche 997 GT3

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Top view of the CP9449 caliper with pad window, Porsche 997 GT3 kit

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Back of the AP Racing rear caliper with bleed screw, Porsche 997 GT3

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Pad pin and retaining clip on the CP9449 caliper for the Porsche 997 GT3

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Pistons inside the CP9449 caliper from the Porsche 997 GT3 rear kit

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Mounting face of the AP Racing CP9449 caliper for the Porsche 997 GT3

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AP Racing Radi-CAL ENP Competition Rear Kit 365mm - Porsche 997 GT3

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Brand: AP RacingSKU / Part #: 13.01.10137-ENP

Regular price: $5,349.00
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AP Racing Radi-CAL ENP Competition Rear Kit 365mm - Porsche 997 GT3

Subtotal: $5,349.00

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Overview

The AP Racing by Essex Radi-CAL Competition Brake Kit with ENP (electroless nickel plated) calipers is a rear brake upgrade for the Porsche 997 GT3, GT3 RS and GT3 RS 4.0. It pairs AP Racing CP9449 Radi-CAL Pro5000R racing calipers with 365 x 30mm, 72-vane AP Racing J Hook discs on fully floating aluminum hats, built for track days and competition driving.

Why upgrade

The kit removes about 9 lb of unsprung weight from the rear of the car compared with the OEM brakes. The caliper takes a 16.75mm thick pad for long life and heat tolerance. The OEM parking brake keeps working. The ENP (electroless nickel plated) finish is very durable and easy to clean. The caliper takes pads from all major pad manufacturers. Every component is designed to resist the heat of extended track sessions. Pistons are sized to work seamlessly with the OEM master cylinder and ABS.

Caliper and disc construction

On the Porsche 997 GT3, the CP9449 caliper mounts radially on a dedicated bracket at 152mm centers with a 44mm offset, with an M10x1.0 inlet thread. Stainless steel caliper hardware gives a long service life even with frequent pad changes. There are no dust boots to burn up at track temperatures. Pads change with one bolt, with no caliper removal. The championship-winning 72-vane AP Racing J Hook discs are fully floating. The discs use anti-knockback, anti-rattle attachment hardware. The disc metallurgy is designed for the temperatures seen on track, for a long service life. Spiegler stainless steel brake lines with a clear sheath reduce compliance compared with the OEM rubber lines.

Features

AP Racing CP9449 0-piston calipers in ENP finish
365 x 30mm, 72-vane J Hook discs on floating hats
About 9 lb less unsprung weight
16.75mm thick brake pads
Pistons sized for the OEM master cylinder and ABS

What's Included

One pair AP Racing CP9449 Radi-CAL Pro5000R racing calipers in ENP (Electroless Nickel Plated) finish
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

Manufacturer part number	13.01.10137-ENP
Brand	AP Racing by Essex
Position	Rear
Application	Track
Caliper	AP Racing CP9449-2/3S4L Radi-CAL Pro5000R racing, radial mount
Caliper weight (no pads)	4.85 lb each
Mounting centers / offset	152mm / 44mm
Inlet thread	M10x1.0
Disc	CP5775-214/215GA two-piece floating, 365 x 30mm, 72 vanes, J Hook
Disc weight	19.0 lb with hat each
Pad thickness	16.75mm
Pad dimensions	132.4 x
Brake pads	Not included
Shipping weight	40 lb (18.1 kg)

Video

Fitment notes

This rear kit fits the vehicles in the table below, which we confirmed against two sources using US model years. Check your wheel with the Essex wheel fitment template before ordering.

Fitment

Questions about fitment? Call (310) 231-0292 or text (310) 886-3111.
Year	Make	Model	Chassis	Engine
2007-2008	Porsche	911 GT3, GT3 RS	997.1	3.6L F6
2010-2011	Porsche	911 GT3, GT3 RS	997.2	3.8L F6
2011	Porsche	911 GT3 RS 4.0	997.2	4.0L F6

Fitment

Year	Make	Model

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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