Fast, Economical and Accurate method to test for combustion gas leaks from: • Head gasket leaks • Cylinder head leaks • Engine block leaks NEW & IMPROVED! Dual-Chamber for Higher Accuracy Test The tester features a dual-chamber design for higher accuracy to eliminate false readings. The first chamber will filter out any alkaline particles that could result in a false indication of a combustion leak. Test results in the second chamber will provide a true indication of a combustion leak. Works on: Gasoline and Diesel engines! Kit Includes: • Dual-chamber tester • Tester Fluid (16 oz./480 ml) • Operating instructions Positive Proof that a leak is present when the Tester Fluid changes color!