1968-1982 C3 Heater Box Evaporator Core Inlet and Outlet Seals 3909099 - OEM Number(s) (3909099)
Seal A/C Evaporator Pipes with Factory-Correct Fitment
These reproduction 1968–1982 Corvette heater box evaporator core inlet and outlet seals restore the critical air-tight seal between your evaporator core outlet pipes and the air conditioning housing. Cut from black sponge rubber to original GM specifications, this pair of foam gaskets eliminates air loss and vibration where the pipes pass through the fiberglass heater box. A must-have detail when servicing or restoring your factory A/C system.
Features
• Fits all 1968–1982 C3 models with factory air conditioning
• Seals evaporator core inlet and outlet pipes
• Prevents air loss, vibration, and moisture ingress
• Die-cut from black sponge rubber to OE specs
• Direct replacement for original GM #3909099
• Sold as a matched pair
Dimensions and Weight
• Material: Die-cut black sponge rubber
• Sold: Pair
• Weight: Less than 2 oz
Tech Notes
• Installs at evaporator housing outlet points
• Used on both inlet and outlet pipe penetrations
• Required when replacing or resealing factory A/C system
Because Details Matter
When restoring your Corvette’s air conditioning system, sealing the evaporator pipes properly is more than cosmetic—it’s essential for system efficiency and long-term performance. These foam seals maintain the factory fit and finish while helping your C3 stay cool, quiet, and true to spec.
Also known under these part numbers: (For reference only)
- 3909099
- 686420091479
- 8846437
- ZAH-479
- zah479