Reduction Ratio - 2:1. This Annovi Reveberi gearbox will fit the following AR pump models and more. For the engine, this gearbox will fit any Honda engine up to 6.5HP (GC160, GP160, GX160, GP200, GX200 etc) and many other brands. 23B Solutions is a leading provider of industrial fluid pump systems and the related parts/accessories.We specialise in high pressure, high temperature, stainless steel, misting, electric, engine driven and hydraulically driven water based systems. This item is in the category "Business, Office & Industrial\Cleaning & Janitorial Supplies\Pressure Washers, Parts & Accessories\Pressure Washer Parts & Accessories\Other Pressure Washer Parts & Accessories". The seller is "23bsolutions" and is located in this country: GB. This item can be shipped worldwide.