Piston & Bearing 2.150in

The Quarter Master Piston & Bearing 2.150in (Part Number 731215) is a replacement piston and bearing assembly designed for Quarter Master Tri-Lite clutch systems. This component serves as the critical engagement mechanism in manual transmission clutch operations, handling the transfer of clutch release force from the linkage to the pressure plate. The 2.150-inch piston diameter is engineered to fit Quarter Master's lightweight Tri-Lite clutch packages, which are favored in high-performance and motorsports applications where weight reduction and precise engagement control are priorities.

As a bearing and piston assembly, this part is precision-manufactured to exacting tolerances to ensure smooth, repeatable clutch actuation and extended component life. The bearing surface must maintain proper clearance and smooth rotation within the clutch housing to prevent drag and binding during engagement and disengagement cycles. Weighing 0.62 pounds and measuring 3.85 x 2.75 x 4.85 inches, the assembly is compact and designed to integrate seamlessly into Quarter Master's modular clutch architecture. Replacement of worn piston and bearing components restores original release characteristics and eliminates the deadspot or vague engagement that develops as bearing surfaces wear.

This replacement assembly is essential for owners maintaining Quarter Master Tri-Lite clutch systems in street, track, or drag racing vehicles. It is sold as an individual unit, allowing targeted replacement of worn components without purchasing an entire clutch assembly. Proper fitment requires confirmation that your clutch system uses the 2.150-inch piston specification; Quarter Master produces Tri-Lite systems in multiple piston sizes depending on vehicle application and horsepower requirements. Technicians and experienced DIY builders familiar with clutch assembly and disassembly can perform the replacement during routine clutch service or after high-mileage wear assessment.