I know this has been asked before but I can't find any good definitive answers. I recently installed an F21, and am finding out that my injectors are exceeding 100% duty cycle at WOT at wastegate pressure causing me to lean out, so I need new injectors. My friend has some spare 550cc S4 injectors with wiring harness adapters, would they fit into my fuel rail? Do I need spacers or anything like that?
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