3400 RPM Black Stinger Spring for Aggressive Acceleration

Delay for dominance: the Black Spring waits until 3400 RPM, then clamps down hard for explosive torque delivery.

• Black color denotes higher threshold for specialized tunes.
• Robust coil withstands repeated high-stress cycles.

On twisty ovals, this timing lets you feather the throttle through apexes, then surge ahead with full engagement. It transforms hesitant power into a relentless drive, ideal for weight-class battles.

Less wear on shoes from partial slips means longer intervals between services.