i would go custom cost less and does the same job and you can get them to sit higher under the car so they dont hit thing.......dont let some one tell you they not as good, and how hks ect. who spend millons on deveolment (ture) are better not ture.... if the guy doing it knows what he is doing it will be just as good...... i spent 1500 on mine and it makes the same kw as big name jobs