Honestly have them on my vehicle since 1/14 and is the best exhaust out there when it comes to quality and sound with ZERO DRONE,Install is a challenge if you dont have a lift,make sure to have a good rubber mallet,other wise take it to the shop 1 hour labor tops,another issue is save your self a trip and dont put them on without the DP from 4DRHTRD,good quality and excellent customer service,just my 2 cent,good luck.