Heater Core Delete Kit SW20 MR2

thingiverse

Includes flanged plugs to block off the factory heater core lines from the firewall and the ducting system. For the flanges, use RTV or windoweld to install. For the heater core plate, you may install as-is, or use a bead of RTV or AC foam tape. I would not recommend PLA, I would say PETG at a minimum, ASA or ABS is preferred if you have an enclosure.