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AP Racing by Essex

Radi-CAL Competition Rear Brake Kit 340x28mm

$5,274.00 $4,849.00 Save $425.00

SKU: 13.01.10120

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The AP Racing by Essex Radi-CAL Competition Brake Kit is a rear brake system designed for 2015+ S550 Ford Mustangs. It features four-piston CP9450 Radi-CAL calipers with an Electroless Nickel Plated (ENP) finish for durability and ease of cleaning. This kit saves approximately 12 unsprung pounds from the rear compared to OEM brakes. It includes 340x28mm, 48-vane heavy-duty AP Racing discs.
Show original supplier description
The AP Racing by Essex Radi-CAL Competition Brake Kit is a high-performance rear brake solution engineered for all 2015+ S550 Ford Mustangs, including the Mach 1 variant. This kit utilizes AP Racing's CP9450 Radi-CAL four-piston calipers, renowned for their patented asymmetrical design that significantly increases stiffness and reduces mass for superior pedal feel and modulation. The calipers are finished with an Electroless Nickel Plating (ENP) which offers exceptional durability, corrosion resistance, and is easy to maintain. This competition-grade kit includes 340x28mm, 48-vane heavy-duty AP Racing J Hook racing discs with floating hats and hardware, as well as Spiegler Stainless Steel Brake Lines. They also feature anti-knockback springs to mitigate pedal drop during aggressive cornering. Each component is built to withstand the extreme heat generated during extended track sessions. This kit offers a weight saving of approximately 12 unsprung pounds compared to the stock rear brakes. It is designed to work in conjunction with front Essex/AP Racing Competition Brake Kits (CP9668 or CP9660). Please note that this kit eliminates the OEM parking brake functionality. Brake pads are not included and must be selected separately, allowing users to choose compounds that best suit their specific needs.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandAP Racing by Essex
Part Number13.01.10120
CategoryBrakes
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Returns & Fitment

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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