Package Includes:High-flow .110" needle and seats ,6.5 Power Valve,30cc accelerator pump diaphragm,Brass accelerator pump check valve,Accelerator pump check valve diaphragm,Non-stick bowl and metering gaskets,Non-stick Open Style Base Gasket,Transfer Tube Seals (O-Ring & Sleeve Style Included)Choke Gasket. Fits Part Number 159064 37-119 3-304 3-305 List-1850 List-1850-1 List-1850-2 List-1850-3 List-1850-4 List-1850-5 List-81850 List-3310-2 List-3310-3 List-3310-4 List-3310-5 List-3310-6 List-80508 List-80508-1 List-83310 List-83310-1 List-83311 List-83312 List-R1850. Works for Holley 4160 Series Vacuum Secondary Carbs 570, 600, 650, 670, 750 & 770 cfm. Works With Holley List Numbers 1850, 3310, 8007, 9015, 9776, 80457, 80508, 80570, 80670 & 80770. Important Note It is aftermarket replacement part. Check pictures with your own original part carefully before buying it. Package Includes:High-flow .110" needle and seats ,6.5 Power Valve,30cc accelerator pump diaphragm,Brass accelerator pump check valve,Accelerator pump check valve diaphragm,Non-stick bowl and metering gaskets,Non-stick Open Style Base Gasket,Transfer Tube Seals (O-Ring & Sleeve Style Included)Choke Gasket Fits Part Number 159064 37-119 3-304 3-305 List-1850 List-1850-1 List-1850-2 List-1850-3 List-1850-4 List-1850-5 List-81850 List-3310-2 List-3310-3 List-3310-4 List-3310-5 List-3310-6 List-80508 List-80508-1 List-83310 List-83310-1 List-83311 List-83312 List-R1850 Works for Holley 4160 Series Vacuum Secondary Carbs 570, 600, 650, 670, 750 & 770 cfm Works With Holley List Numbers 1850, 3310, 8007, 9015, 9776, 80457, 80508, 80570, 80670 & 80770 Important Note It is aftermarket replacement part. Check pictures with your own original part carefully before buying it.