about a year ago all the manifactures of the billet alumn reguars where having probelms becasue they used 2 diffren metal that expanded diffrenly or something amount those lines..i clearly rember bbk being one and MAC was making one but they pulled it because theres was doing it also..
my Kirban is the best AFR i have ever owned(had 4 diffren ones)it holds like i said like a champ..20psi after 2 days
..so far i have had this same one on an all motor 5.0, then a dry sprayed 5.0, and now my 2.3 pushing close to 20#'s of boost..still works awsome..cant say enuff good things