If they were out of a flex fuel truck... yes then they are suppose to be 36# injectors, but the actually put out more like close to 40# but, the non-flex fuel trucks have 24# injectors. the only other motor that had different injectors was the 8.1L. and just because you have returnless style fuel system does not mean that your flex fuel either... that was just something they started in the 04's
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