5.5 Optimum Pressure Plate

The 5.5 Optimum Pressure Plate from Quarter Master is a precision clutch component engineered for high-performance manual transmission systems requiring reliable, consistent engagement and disengagement cycles. Designed for competition, street performance, and demanding driving applications, this pressure plate delivers the holding force necessary to transmit engine torque efficiently while maintaining predictable pedal feel. The 5.5-inch diameter format makes this plate compatible with a range of small-block and mid-sized engine platforms where compact clutch packaging is essential.

Constructed from hardened steel in natural finish, the 5.5 Optimum Pressure Plate features Quarter Master's Optimum-V clutch design, which optimizes finger geometry and spring rates to reduce pedal effort while maximizing clamp load stability across RPM ranges. The steel construction provides superior heat dissipation and durability under sustained high-torque conditions, preventing premature wear and extending service intervals. Weighing 1.01 lbs, this plate integrates seamlessly into compact bell housing assemblies without compromising structural integrity or introducing vibration issues common in lighter aftermarket alternatives.

Buyers upgrading to performance clutch systems—including those installing larger displacement engines, upgrading torque capacity, or transitioning to manual control in paddle-shift or motorsport applications—will benefit from the 5.5 Optimum Pressure Plate's consistent modulation and longevity. Installation requires alignment with a compatible Quarter Master clutch disc and flywheel assembly; proper torque sequencing during mounting is critical to prevent warping and ensure even pressure distribution. This pressure plate is sold individually, so verify your complete clutch kit requirements before purchase to ensure all components work in concert.