Flywheel 7.25in SBC L/W Blank Bolt Pattern

The Quarter Master Flywheel 7.25in SBC L/W Blank Bolt Pattern is an external balance, button-style flywheel engineered for small-block Chevrolet applications requiring precision rotational balance and reliable clutch engagement. Built from steel construction with a 7.25-inch diameter, this flywheel delivers consistent performance in street, strip, and high-performance engine builds where weight savings and dynamic balance matter.

The external balance design accommodates harmonic balancers and dampers sized for lighter-duty applications, reducing rotational mass while maintaining the structural integrity needed for repeated thermal cycles and shock loads. The one-piece seal integration eliminates multi-part sealing complexity, reducing potential leak points and simplifying installation. At 4.4 pounds, this lightweight flywheel decreases crankshaft inertia, improving throttle response and reducing parasitic drag—measurable advantages in vehicles prioritizing acceleration and fuel efficiency over thermal mass capacity.

This is the choice for small-block Chevy owners building efficient street engines, autocross platforms, or light-duty drag applications where stock or near-stock displacement and compression don't demand heavyweight flywheel inertia. The blank bolt pattern accommodates various clutch pressure plate configurations, offering flexibility across different manual transmission combinations. Quarter Master's reputation for manufacturing precision flywheels makes this part a reliable foundation for projects requiring verified dynamic balance without oversizing.

SBC (small-block Chevrolet) flywheels come in multiple weight classes and balance specifications; the lightweight designation here suits builders avoiding the heat absorption and rotational drag of heavier forgings. Verify your harmonic balancer and damper compatibility before ordering, as external balance flywheels require matching damper designs to maintain crankshaft balance integrity.