AP Racing Radi-CAL ENP Front Kit 372mm - C5 Corvette

The AP Racing by Essex Radi-CAL Competition Brake Kit with ENP (electroless nickel plated) calipers is a front brake upgrade for every 1997-2004 C5 Corvette, including Z06. It pairs AP Racing CP9668 Radi-CAL Pro5000R racing calipers with 372 x 34mm, 84-vane AP Racing J Hook discs on fully floating aluminum hats, built for track days and competition driving.

Why upgrade

The kit removes about 10 lb of unsprung weight from the front of the car compared with the OEM brakes. Each caliper weighs 6.8 lb without pads, against 10.1 lb for the factory caliper. Each two-piece disc weighs 19.1 lb, compared with 21.8 lb for the original 325mm disc. The 25mm pad is thicker than the 14.7mm 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 C5 Corvette, the CP9668 caliper mounts radially on a dedicated bracket at 180mm centers with a 42mm offset, with an M10x1.0 inlet thread. The caliper uses a commonly available 25mm thick 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. 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.

Features

• AP Racing CP9668 six-piston calipers in ENP finish
• 372 x 34mm, 84-vane J Hook discs on floating hats
• About 10 lb less unsprung weight
• 25mm thick brake pads
• Pistons sized for the OEM master cylinder and ABS

What's Included

• One pair AP Racing CP9668 Radi-CAL Pro5000R racing calipers in ENP (Electroless Nickel Plated) finish
• One pair 372x34mm AP Racing CP6084, 84 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 CCW TS12 18x11 shallow concave. Check your wheel with the Essex wheel fitment template before ordering.

Fitment