great product just what you need to keep your vehicles air filter like new easy to apply until auto makers go back to putting bumpers on cars these are it it did the job and got me by the south honk honk louder than i expected but still the tone you buy it loud if youre indoors in a car not as much loud does an excellent job great kit liked it better than the spray kit filter cleaner the way to go cleaner i got a defective product but have bought these before and usually work very well