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The GFB underdrive crank pulley for Nissan 300ZX reduces rotating mass to improve throttle response and acceleration. Machined from a single billet of 6061‑T6 aluminium and CNC finished, the pulley lowers inertia by up to 85% so more torque reaches the wheels. It’s a bolt‑on underdrive solution that can also reduce accessory parasitic load at high RPM without requiring extra tuning.
GFB Nissan 300ZX Crank Pulley
