I have had my 21's installed since 2003'ish and they have suffered alot of abuse but only 10-20 times a year. They have seen the 22RE, 5MGE, and a 4.3 and never a problem ( I am steady on the skinny). If I was to do it again, I would go full bore, all the extras. Soon or a later I am gonna have a failure, just wondering what its gonna be
