12 Volt, 1.8kw High Torque Starter Jackshaft with Small Hole 10-32 Thread Will Replace Older 1.2kw & 1.4kw Versions Guaranteed to Meet or Exceed OEM Performance Unit Contains Protorque "Life-Time" High Performance Clutch with Special Metals, Hardened Cam, Sealed Bearings, High-Temperature Springs, Oversize Rollers, and Factory Pre-Lubing Replaces OEMs 31553-94, 31553-94A, 31553-94B)