NC Miata exhaust plugs for finding exhaust leaks

thingiverse

Made these two plugs so that I could pressurize my exhaust system to locate the source(s) of my exhaust leaks. I used a 60 gallon air compressor and a low pressure regulator(linked) to dial the pressure down to 5psi. This is plenty enough to find any leaks and not too high to cause any issue with other parts of the engine that will likely become pressurized such as crank case. One plug has 1/4 NPT port. The other is just a blank plug. 0-30psi pressure regulator: https://www.amazon.com/gp/product/B01BPQDG62/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 1-7/8(OD) o-ring: https://www.amazon.com/gp/product/B08DWHMH9V/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 I used some painters tape to hold the plugs up tight against the exhaust tips otherwise the 5psi will pop them out the back.