Originally Posted by BillBoost37
IMO the intakes are all going to experience the same thing. I think we haven't seen enough age and mileage yet to see the manifestation.
That'* pretty much it, in a nutshell. Improvements made to the EGR stovepipe will make 00'* (and late 99'*) last longer, but it never really 'fixed' the problem. the upper itself never changed.
as for the lowers, there've been two updates in the last year and a half, first to put metal sleeves in, and the second (though I haven't seen them myself) made the entire gasket carrier metal.