GMW14891 3rd Edition, September 2015 VEHICLE EXHAUST BACKPRESSURE AND INDUCTION PRESSURE LOSS MEASUREMENT * INCLUDES CG2557 **GMW RES/CONF STD -CONT SALES -US CUST CALL 1-800-854-7179/NON-US SELECT WW OFFICES LINK AT BOTTOM OF PG TO FIND OFFICE TO CONT * HAS COLOR * CUST FILL OUT AUTH FORM