they sound like that because of all the vaccum they create alot of v8's with crazy cams need to have a seprate vaccum source just to run right..........Sure they sound cool but honestly in a street car, you will do much better with a setup made for the street...........they do exaclty what they say. they eliminate vtec. they eliminate the middle rocker arm for the vtec lobe. it also gives you caps to cap off certain oil galleys in the head for vtec Toda K-series VTEC Killer Camshafts have them for sale ...good luck