ZEV Performance 372 × 34 mm replacement rotor rings are designed for AP Racing 9660 and 9668 brake applications. Sold as a pair, they use a high-carbon alloy and directional ventilation for track and race use.
Construction and performance
- 372 × 34 mm replacement disc pair
- CM-250 specially formulated high-carbon alloy cast iron
- 72 directional ventilation vanes
- Floating two-piece rotor design
- Slotted friction surface
- Heat-treated to relieve internal stress before machining
- CBN surface machining to support pad bedding
- Maximum published lateral runout: 0.03 mm
- Published balance variation: within 2 grams
The directional vane and slot design is intended to improve heat rejection, maintain a clean pad-contact surface, reduce fade and judder during extended sessions, and disperse water in wet conditions. Published testing states up to 30% lower operating temperature and up to 30% greater cooling efficiency than original-equipment rotors.
Ordering options
- None
- Bolt Kit — no bobbin
- Complete — with bobbin
Select the hardware configuration that matches the existing AP Racing hat and bobbin assembly. Confirm compatibility before ordering.