Back Pressure Test Kit 
Aids in diagnosing clogged or restricted exhaust systems. Allows comparing backpressure readings ahead and behind of suspected restriction. Ideal for diagnosing clogged catalytic converters, collapsed exhaust pipes, etc. Kit includes small hole punch for use with air hammer, 5/16" X 1/2" self-tapping bolt and test adapter. Use self tapping bolts to plug hole after test is completed. (Note: Do not install directly into catalytic converter or muffler.) Gauge not included. Use 0 to 15 pound pressure gauge.
WARNING May Cause Cancer and Reproductive Harm www.P65Warnings.ca.gov
Shipping Weight 0.55 lb.
Availability: In stock.