Richmond Excel Ring and Pinion - 4.10 Ratio - 27 Spline Pinion - 3 Series - 7.5 in / 7.625 in / 7.6 in IFS - GM 10-Bolt 1010-17 Pulse Width Modulation controls fan(s)

Pulse Width Modulation controls fan(s) speed from 0-100%

and featuring -6AN male fittings

Durable A356 T6 Hardened Aluminum Construction Provides Strength and Light Weight

while eliminating knocks and pings

Richmond Excel Ring and Pinion - 4.10 Ratio - 27 Spline Pinion - 3 Series - 7.5 in / 7.625 in / 7.6 in IFS - GM 10-Bolt 1010-17 Pulse Width Modulation controls fan(s)EXCel drivetrain products are engineered to exceed OEM specifications by manufacturing to precise specifications in world class factories, using the latest heat treatment technology, with extensive quality controls throughout. Richmond Gears EXCel drivetrain products offer high quality OEM replacement drivetrain products for your vehicle. Richmond Gears EXCel line of ring &amp pinon gearsets provide Richmond quality at affordable prices. All EXCel