ACT Flywheel Counterweight for 2004 Mazda RX-8

"Excellence in Performance", backed by the best one-year warranty in the industry! Flywheel Counterweight Assuring smooth operation; Reduces load on bearings to extend engine life; Precisely machined for minimal balancing adjustment; Recommended for use with ACT flywheel; Manufactured to tight tolerances, balanced to perfection CW03 counterweights are required when installing an XACT flywheel for various applications.