PEM Quick Change Gear Set, Standard 10 Spline

610-Series Quick Change Gears — Built for Circle Track Domination

Unleash maximum traction and precision on the track with the 610-Series Quick Change Gear Sets — engineered to give Late Models, Modifieds, and 305/360 Sprints an unbeatable advantage when it counts. Crafted from 8620 heat-treated steel, these gear sets are built tough to withstand the high stress and abuse that circle-track racing demands.

Key Features

• Premium 8620 Heat-Treated Steel: High-strength alloy steel construction delivers rock-solid durability and the resilience needed for repeated race conditions.

• Wide Compatibility: 10-spline design fits quick-change rear ends from PEM, Winters, Frankland, Bulldog (DMI), Tiger, Halibrand, Jones, and other major manufacturers.

• Versatile Use: Ideal for Late Models, Modifieds, and 305/360 Sprint cars — anywhere you need quick ratio changes or consistent power delivery through corners.
• Customizable Gear Ratios: Choose from multiple gear-ratio set numbers to dial in the perfect setup for track conditions, torque delivery, or acceleration characteristics. See our Gear Chart for more information. 

Why It Matters

Circle-track racing pushes your rear end to the limit — hard launches, heavy corner loads, and rapid gear demands require reliable, race-ready components. The 610-Series gears are purpose-built for this environment: they deliver strength to handle brutal torque, smooth engagement to preserve driveline integrity, and versatility so you can adjust gearing based on track surface or race strategy.

Plus, because they’re compatible with many of the most-common rear-end platforms, you avoid the headache of complicated retrofits — making them a straightforward upgrade or replacement when you’re chasing performance and consistency.