I had a problem with my vehicle because of the high temp of the cat converters that were surrounding th trany, i had to change the trany oil twich within 20,000 KM.i took the exhause out, cleaned in and out, wrapped sprayed and installed back.tempreture of air coming from under the vehicle has dropped significantly, trany feels better with smooth shifting all way for long drives.you have to be careful while applying it. wear gloves, and wet the wrap for easy and firm application.i might have applied the spray more than required in some spots, i ran out of it before spraying all the wraped areas