Essex Designed AP Racing Competition Brake Kit (Rear CP5040/340mm) | S550 Mustang
- CP5040: 4-piston racing caliper at 5.8 lbs per side
- 340x28mm: 60-vane J Hook discs at 10.98 lbs each
- ~12 lbs saved: Unsprung weight reduction from rear axle
- Pairs with CP5060: Complete your front & rear AP Racing system
AP Racing by Essex
AP Racing Competition Rear Brake Kit CP5040 • 340mm • S550 Mustang
Complete your track brake setup with the entry-level rear AP Racing kit featuring 60-vane J Hook discs.
Why Choose This Kit
Engineered Without Compromise
Radi-CAL Technology
30%+ stiffer than conventional calipers. Superior pedal feel, even pad wear, and longer service life.
Hard Anodized
Temperature-resistant hard anodized finish built to endure repeated track abuse.
OEM Integration
Works with factory master cylinder, ABS, and stability control. No modifications required.
Lifetime Support
Essex is AP Racing's official rebuild center. Professional reconditioning available for the life of your kit.
Complete Kit
What's In The Box
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AP Racing CP5040 Calipers (Pair) 4-piston Radi-CAL Pro5000R with hard anodized finish and ventilated stainless steel pistons
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AP Racing J Hook Racing Discs (Pair) 340x28mm with 60 directional vanes. 2-piece fully floating with 6061 T6 aluminum hats
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Caliper Mounting Brackets & Hardware Precision-machined 6061 T6 billet aluminum, hard anodized, with aircraft-quality hardware
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Spiegler Stainless Steel Brake Lines USA-made with PTFE-Teflon lining, 360-degree torsion fittings, DOT compliant
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Installation Instructions Detailed step-by-step guide for proper fitment
Technical Data
Specifications
Caliper: CP5040
4-Piston Radi-CAL Pro5000RDisc: 340x28mm
J Hook Racing DiscFitment
Compatible Vehicles
Not Included
Brake Pads: Racing pads are a personal choice. Select your preferred Ferodo compound at checkout.
Pad Tension Kit: Available as an optional add-on to eliminate pad rattle.
Important Notes
Application: Designed for track/competition use.
Parking Brake: This kit eliminates OEM parking brake functionality.
Professional Installation
Function Factory Performance offers professional installation and track support for your AP Racing brake system.
Ready to Upgrade?
Professional Installation Available
Function Factory Performance offers expert installation and track support for your AP Racing brake system.
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