Hard Seal Exhaust Port Kit (p/n 001101) allows you to install a threaded insert into the exhaust pipe upstream of the tailpipe in the exhaust system. This provides a method to extract a pure sample of exhaust gas without concern for air dilution due to ambient air mixing in the exhaust gas sample. This means that what the analyzer will read is pure exhaust gas, which makes for much more accurate determination of gas emissions levels and engine diagnostics parameters, such as Lambda (AFR) and Combustion Efficiency.
