Product Details:

• 6:1 Gearbox That Fits a Standard 5.5 HP Gas Engine With a 3/4" Shaft
• Made by Hypro
• Part # 9910-Kit1640
• Works With the Following Pump Model #s: 910-D30, 9910-D303 and 9910-D403
• Can be Used With the Following Pump Model #s if They are Used at a Lower Pressure That Does Not Exceed 5.5 HP Gas Engine Capabilities: 9910-D50, 9910-D503 and 9910-D813