I have a large crack between the rearmost two tubes on the Poston driver's side header. They have a lifetime replacement policy, but I gasket matched the ports, and would hate to look at repeating that more than once.
I am posting to ask how many others have experienced this, and if there is a preventive measure. Poston's comment was that it happens on cars that run lean, but my O2s are never below 800.
I am posting to ask how many others have experienced this, and if there is a preventive measure. Poston's comment was that it happens on cars that run lean, but my O2s are never below 800.