Installed on the car. The only reason I used a T fitting here is due to the fact that I didn't have an elbow fitting and didn't feel like running yet again to the hardware store. Of course, that T fitting would work nicely on the other end where the air from the bubblers enter. If I used a separate line for the bubbler from the HHO, I could use that T fitting to keep things separate before they enter the GEET reactor chamber. Right now I have no second bubbler and using only the gas from the HHO bubbler just to get started. The GEET gases will exit here at the elbow, flowing contrary to the exhaust.

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