AP Racing Radi-CAL ENP Rear Kit 340mm - Porsche 987, 981, 718

The AP Racing by Essex Radi-CAL Competition Brake Kit with ENP (electroless nickel plated) calipers is a rear brake upgrade for Porsche 987, 981 and 718 Boxster and Cayman. It pairs AP Racing CP9451 Radi-CAL Pro5000R racing calipers with 340 x 28mm, 48-vane AP Racing J Hook discs on fully floating aluminum hats, built for track days and competition driving.

Why upgrade

Eliminates unsprung weight from rear of the car. The caliper takes a 16.75mm thick pad for long life and heat tolerance. Pads change with one bolt, with no caliper removal. The OEM parking brake keeps working. The ENP (electroless nickel plated) finish is very durable and easy to clean. 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 987, 981, 718, the CP9451 caliper mounts radially on a dedicated bracket at 152mm centers with a 44mm offset, with an M10x1.0 inlet thread. Anti-knockback springs behind the caliper pistons limit pad knockback. 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. The championship-winning 48-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 CP9451 four-piston calipers in ENP finish
• 340 x 28mm, 48-vane J Hook discs on floating hats
• 16.75mm thick brake pads
• Pistons sized for the OEM master cylinder and ABS
• No caliper removal for pad changes

What's Included

• One pair AP Racing CP9451 Radi-CAL Pro5000R racing calipers in ENP (Electroless Nickel Plated) finish
• One pair 340x28mm AP Racing CP6565 heavy duty 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

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 19 inch wheel from 2010 Cayman S (pictured below), APEX SM-10 18x10 inch, OZ Alleggerita HLT 18 x 10.0 inch +40 and Volk Racing TE37 Ultra 19x10 ET40. Check your wheel with the Essex wheel fitment template before ordering.

Fitment