Step 4:  The finished homebrew CAI.  The pipes were glued together with tread sealant.  The gaps at the pipe junctions inside the tube were filled with caulking and smoothed out.  Uneven pieces of caulking were removed when dry.  A 0.75" hole was drilled into the side of the third elbow from the filter for the air temperature sensor.  The entire assembly was then wrapped with foil tape and smoothed out.  Two layers of foam were cut to size, treated with filter oil, wrapped around the bypass valve and secured by screw clamps. 

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