Parts › 4031 - Vacuum Pump exhaust Muffler (2" male thread) Image 1 of 1 4031 - Vacuum Pump exhaust Muffler (2" male thread) $220.56 Quantity: Purchase Added! You Might Also Like 5054 - Temperature Sensor $38.00 4094 - Busch Vacuum Pump (Steel version pump only) Sale Price: $1,699.00 Original Price: $2,748.43 Sale 3019 - iDRY Silicone Gasket Kit - KIT $495.00 4016 - Vacuum Hose $93.00 4026 - Vacuum Pump Water Solenoid $234.95