Engine builders and Dyno Operators have successfully used “Blow By” as a prime indicator of a ring seal efficiency.

Properly used in conjunction with a leak-down meter, you can accurately monitor your engine’s condition.

Tool can be mounted on Dyno or in the car

Perfect for evaluating evacuation pumps on race cars

Meters are 16″ long with mounting hardware included

Complete instructions included

Scale is 1 to 10

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