AP Racing Radi-CAL ENP Competition Front Kit 372mm - BMW E9X M3, 1M

The AP Racing by Essex Radi-CAL ENP Competition Brake Kit replaces the single-piston floating front brakes of the BMW E90, E92 and E93 M3 and the E82 1M Coupe. AP Racing CP9660 Radi-CAL Pro5000R six-piston calipers in electroless nickel plating clamp 372 x 34mm, 72-vane J Hook discs, turning the S65 V8 and N54 cars into consistent, fade-resistant track machines.

Why upgrade

The factory front caliper is a heavy single-piston design weighing 13 pounds. Each CP9660 weighs 6.2 pounds, and each AP Racing disc 19.1 pounds versus 22.5, for a total saving of roughly 14 pounds of unsprung weight at the nose. A fixed six-piston caliper also spreads clamping force evenly across the pad, which improves pedal feel and reduces taper wear. Pistons are sized for the OEM master cylinder and ABS, and the kit pairs with the factory rear brakes or a matching AP Racing rear kit.

Caliper and disc construction

Radi-CAL's asymmetric body was developed with computer modeling to keep material only where loads flow. The ENP finish resists wear and deterioration at elevated temperatures and keeps its shine with simple cleaning. Inside are stainless steel pistons, anti-knockback springs and low-drag, high-temperature seals, and pad changes do not require caliper removal. The CP7177 discs float on 6061 hard anodized aluminum hats.

Features

• AP Racing CP9660 Radi-CAL Pro5000R six-piston calipers, ENP finish
• 372 x 34mm, 72-vane J Hook discs on floating aluminum hats
• About 14 lb lighter than the factory front brakes
• Fits OEM 18 inch and several OEM 19 inch wheels without a spacer
• Works with OEM rear brakes or a matching AP Racing rear kit

What's Included

• One pair AP Racing CP9660 Radi-CAL Pro5000R racing calipers in ENP (Electroless Nickel Plated) finish
• One pair 372x34mm 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

Fits the US E9X M3 and 1M Coupe models below. Clears BMW OEM 18 inch wheels, the ZCP 359M 19 x 9 ET31 and the 220M 19 x 8.5 ET29 without a spacer, plus many aftermarket 18 inch wheels; the OEM 219M wheel needs a 15mm spacer. Check other wheels with the wheel fitment template.

Fitment