1988 - 1992 Honda CRX Si Crank Pulley NST21615 Lightweight Crank Pulley

The NonStopTuning Honda CRX Si Crank Pulley increases horsepower via great weight reduction and the underdriving of accessories.  

​Each kit is CNC machined from 6061-T6 aircraft quality aluminum, and tested for tight machining and balance tolerances. Every NST pulley is hard anodized for exceptional durability and is available in a choice of colors.
​ ​AVERAGE WEIGHT COMPARISONS

- OEM Crank Pulley 70 oz | 2 kg
- NST Crank Pulley 14 oz | 400 g

- OEM Water Pump Pulley 16 oz | 450 g
- NST Water Pump Pulley 6 oz | 170 g

- OEM Power Steering Pulley 16 oz | 450 g
- NST Power Steering Pulley 6 oz | 170 g

- OEM Alternator Pulley 10 oz | 285 g
- NST Alternator Pulley 3 oz | 85 g ​PERFORMANCE BENEFITS

Weight Reduction
- Approximately 70% - 75% vs OEM

Dyno Proven Horsepower & Torque
- Average of 7-10 horsepower & torque

Better Throttle Response & Fuel Economy
- Smoother operation and higher MPG

​Ongoing Research & Development
- visit the DYNO page of our website!