AP Racing Radi-CAL Competition Rear Kit 365mm - Toyota GR Supra

The AP Racing by Essex Radi-CAL Competition Brake Kit is a rear brake upgrade for the 2020-2025 Toyota GR Supra 3.0. It pairs AP Racing CP9450 Radi-CAL Pro5000R racing calipers with 365 x 30mm, 72-vane AP Racing J Hook discs on fully floating aluminum hats, built for track days and competition driving. Fits behind OEM wheels without a spacer.

Why upgrade

The kit removes about 22 lb of unsprung weight from the rear of the car compared with the OEM brakes. Each caliper weighs 4.85 lb without pads, against 13.2 lb for the factory caliper. Each two-piece disc weighs 14.3 lb, compared with 18.4 lb for the original 345mm disc. The caliper takes a 16.75mm thick pad for long life and heat tolerance. 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 Toyota GR Supra, the CP9450 caliper mounts radially on a dedicated bracket at 152mm centers with a 44mm offset, with an M10x1.0 inlet thread. 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. The caliper uses a commonly available pad shape. 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. The anodized caliper finish resists wear and deterioration at high temperatures. Stainless steel caliper hardware gives a long service life even with frequent pad changes.

Features

• AP Racing CP9450 0-piston calipers
• 365 x 30mm, 72-vane J Hook discs on floating hats
• About 22 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 CP9450 Radi-CAL Pro5000R racing calipers
• One pair 365x30mm AP Racing CP8972, 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 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 rear Supra wheels and Volk TE37 Sagas 18x11 +34. Not for the four-cylinder GR Supra 2.0. Check your wheel with the Essex wheel fitment template before ordering.

Fitment