AP Racing Radi-CAL ENP Front Kit 355mm - Porsche 986, 987, 997.1

The AP Racing by Essex Radi-CAL Competition Brake Kit with ENP (electroless nickel plated) calipers is a front brake upgrade for Porsche 986 and 987 Boxster and Cayman and the 997.1 911 Carrera. It pairs AP Racing CP9661 Radi-CAL Pro5000R racing calipers with 355 x 32mm, 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 4 lb of unsprung weight from the front of the car compared with the OEM brakes. The 18mm pad is thicker than the 15.4mm factory pad, so it lasts longer and absorbs more heat between changes. 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. It works with the OEM rear brakes or a matching AP Racing rear kit.

Caliper and disc construction

On the Porsche 986, 987, 997.1, the CP9661 caliper mounts radially on a dedicated bracket at 180mm centers with a 42mm offset, with an M10x1.0 inlet thread. Ventilated, domed-back stainless steel pistons keep heat out of the brake fluid for a very firm pedal. 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. Pads change with two bolts or a quick-change spring clip, 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.

Features

• AP Racing CP9661 six-piston calipers in ENP finish
• 355 x 32mm, 72-vane J Hook discs on floating hats
• About 4 lb less unsprung weight
• 18mm thick brake pads
• Pistons sized for the OEM master cylinder and ABS

What's Included

• One pair AP Racing CP9661 Radi-CAL Pro5000R racing calipers in ENP Finish (Electroless Nickel Plated)
• One pair 355x32mm AP Racing CP7177, 72 vane, 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 front kit fits the vehicles in the table below, which we confirmed against two sources using US model years. Essex has confirmed clearance with APEX SM-10 18x8.5 inch ET50, APEX SM-10 18x8.5 inch and APEX SM-10 18x9 inch ET46. Check your wheel with the Essex wheel fitment template before ordering.

Fitment