AP Racing Radi-CAL ENP Front Kit 340mm - Mazda Miata, Fiat 124

The AP Racing by Essex Radi-CAL Competition Brake Kit with ENP (electroless nickel plated) calipers is a front brake upgrade for the ND Mazda MX-5 Miata and Fiat 124 Spider. It pairs AP Racing CP9449 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

The kit removes about 6 lb of unsprung weight from the front of the car compared with the OEM brakes, despite being considerably larger. Each caliper weighs 4.85 lb without pads, against 7.5 lb for the factory single-piston slider caliper. Each two-piece disc weighs 11.1 lb, compared with 13.05 lb for the original 280mm disc. The 16.75mm pad is thicker than the 14.6mm 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.

Caliper and disc construction

On the ND Miata, 124 Spider, the CP9449 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. Pads change with one bolt, with no caliper removal. 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.

Features

• AP Racing CP9449 0-piston calipers in ENP finish
• 340 x 28mm, 48-vane J Hook discs on floating hats
• About 6 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 Finish (Electroless Nickel Plated)
• 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 front 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