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MX5 AC Delete HVAC Pipe and bungs preview

Files (5)

AC_Drain_Bung.STL
STL
233.9 KB
AC_Fire_Wall_Bung_Large.STL
STL
261.1 KB
AC_Fire_Wall_Bung_Small_v2.STL
STL
229.1 KB
HVAC_Ducting_Sqr.STL
STL
451.9 KB
HVAC_Ducting_Tri.STL
STL
483.5 KB

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PETG filamentAmazon · Affiliate linkAmazon product page for 1.75 mm PETG; confirm colour, spool size, print temperature, seller, and delivery region.Check price at Amazon
ASA filamentAmazon · Affiliate linkAmazon product page for 1.75 mm ASA; use an enclosure and suitable ventilation, and confirm seller and regional availability.Check price at Amazon

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Mechanical/Functional

MX5 AC Delete HVAC Pipe and bungs

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CC BY
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Attribution required

The file license permits commercial reuse, subject to any applicable attribution or share-alike terms. License status does not verify vehicle fitment, OEM rights, design patents, or safety.

TT

Description

Part of removing the crumbling AC system from a 1995 NA MX5 involves removing the evaporator box from behind the dash. You can buy a replacement part to connect up the blower housing to the heater core, but where is the fun in that? This is a work in progress as only designed the ducting, I am yet to print and test fit the parts. Edit 22/04/2022, Uploaded the CAD models of the Ducts but I am yet to print them, so no idea if they fit or not. I have also draw up some bungs to plug the holes left by removing the box. One of them is for the box drain pipe, secured by a cable tie. And the other 2 push into the rubber grommets in the firewall. This is for the RHD version of the car, I believe (but cannot confirm) it is different for the LHD version. I have printed the Bungs in PetG due to close proximity to hot engine parts.

Compatible Vehicles

Published Jun 27, 2026Updated Sep 14, 2026

Originally published on thingiverse.com by Tim Taylor (timmyisasleep) · License: CC BY

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