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AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z: 4-piston CP9451 Radi-CAL rear calipers and 365 mm J-Hook discs. Ships nationwide with expert fitment support from Diamond Parts.
Send us your VIN and we’ll confirm fitment before you buy.
When you buy AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z, you get a proven AP Racing by Essex Radi-CAL CP9451 package: 4-piston CP9451 Radi-CAL rear calipers and 365 mm J-Hook discs. The Z34 370Z and the newer RZ34 Nissan Z share a rear brake layout that responds well to a proper upgrade.
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Here is what you get when you buy AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z:
| Product | AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z |
|---|---|
| Brand | AP Racing by Essex |
| Product line | Radi-CAL CP9451 |
| Position | Rear axle |
| Vehicle fitment | Nissan Z RZ34 and 370Z Z34 |
| Caliper | AP Racing CP9451 Radi-CAL (Pro5000R), rear |
| Pistons | 4 stainless steel, domed and ventilated |
| Discs | 365 x 30 mm two-piece floating J-Hook, 72 directional vanes (handed pair) |
| Hats | 6061 billet aluminium, hard anodized, fully floating |
| Parking brake | Factory parking brake retained |
| Brake lines | Spiegler stainless steel |
| Brake pads | Sold separately (DS1.11, DS2500, DS3.12, DSUNO) |
| Kit includes | Pair of calipers, pair of discs with hats and hardware, caliper brackets, brake lines, instructions |
| SKU | 28A4FE7B |
Once you buy AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z, you will find the included brackets are made for your vehicle, so the kit bolts on without cutting or drilling. Use fresh, high-temperature brake fluid when you bleed the system, tighten every bolt to the correct torque, and check that the new lines have enough slack and stay clear of moving suspension parts. Turn each wheel by hand before driving to confirm the caliper clears the inside of the rim with room to spare.
After you buy AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z, a careful bed-in procedure gets the best from fresh pads and rotors. Make several medium stops from about 40 mph to 10 mph, then a few harder stops from higher speeds, without holding the car stationary on hot brakes. A slow cool-down drive afterwards lets the pad material settle evenly onto the rotors, which gives you a firm pedal and consistent bite from the very first week.
Before you buy AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z, think about how you drive. Street-focused compounds give quiet operation, low dust and good cold bite for daily driving, while track compounds hold up to much higher temperatures without fading. If your car sees both commutes and occasional track days, a dual-purpose pad is often the best compromise. Our team can recommend a compound based on how you drive, your tyres and your power level, so you get the most from your purchase when you buy AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z.
After you buy AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z, inspect the pads and rotors on a regular schedule and after every track day. Change the brake fluid at least once a year, since moisture lowers its boiling point. Wash the calipers with mild soap and water and avoid acidic wheel cleaners, which can dull the finish over time.
To learn more about the engineering behind these components, visit the official AP Racing website.
Designed for the Nissan Z RZ34 and 370Z Z34. Exact fitment can vary with model year, trim and wheel design, so send us your VIN and wheel specification through our contact page and we will double-check everything before your kit ships.
Stop guessing and start braking later. Buy AP Racing CP9451 Radi-CAL Rear Brake Kit for Nissan Z RZ34 and 370Z from Diamond Parts, or call (303) 418-3426 and we will help you choose the right setup.
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