ACT Release Bearing for 1990 Mazda Miata | RB813

Noticeably improved engine response and acceleration, OE to mild gear rattle; Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life; One piece construction...

Aggressive engagement, quick shifts, OE to mild gear rattle; Premium ceramic friction materials provide moderate wear rates and high heat tolerance; Utilizes wraparound spring windows, thicker...