Depending on how rich it is, that can cause the cat to melt as well. The unburned fuel hits the hot core and it causes the fuel to combust. Having this happen for a prolonged period of time makes the cat hot enough to melt.
This happened to a lot of guys running Berk and other brand's HFC's on the 350, now most people just run test pipes on FI applications.
Last edited by 350z 6spd; 12-12-2010 at 09:47 PM.
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