ACT Prolite Flywheel Kit for Mazda RX-7 RX-8 with Counterweight Lightweight

ACT Prolite Flywheel Kit for Mazda RX-7 / RX-8 (With Counterweight) — Lightweight Performance Part: 600140-03 — engineered for Mazda RX-7 and RX-8 rotary applications. This complete kit includes the required ACT counterweight for safe, reliable installation of the XACT Prolite flywheel. Key Features Ultra-low inertia: ACT Prolite is the lightest flywheel in the lineup for faster rev response and quicker acceleration. Counterweight included: Precisely balanced counterweight ensures smooth operation and correct rotating mass for RX-7/RX-8 engines. Race-proven design: Ideal for road racing, rally, and track use where throttle response and transient acceleration matter most. Durable construction: Material distribution optimized for strength, heat tolerance, and rigidity under demanding conditions. Serviceable: Flywheels can be resurfaced—no extra parts required—extending service life and reducing long-term cost. Benefits Switching to the ACT Prolite delivers sharper throttle feel, faster engine braking recovery, and improved acceleration off the line. While optimized for motorsport, expect reduced drivability in daily stop-and-go driving due to the lower rotating mass. Applications & Fitment Designed specifically for compatible Mazda RX-7 and RX-8 rotary setups. Verify model year and transmission compatibility before purchase. Upgrade to ACT Prolite for uncompromised track performance and precise engine response—complete with the counterweight required for a correct, balanced installation.